Our digital ad spend isn't showing ROI. How does a Digital Marketing Manager hire a great PPC agency?

If your digital ad spend isn't showing ROI, I’d make measurement and business economics the first hiring filter—not agency credentials or flashy case studies.

Google itself says ROI is the key measure for evaluating advertising investment, and that you need conversion tracking and meaningful conversion values to connect ad spend to business outcomes.

How a Digital Marketing Manager should hire a great PPC agency

1. Fix your definition of “ROI” before interviewing agencies

Don't accept:

• “We'll improve CTR.”
• “We'll lower CPC.”
• “We'll get you more leads.”
• “Your Google Ads optimization score will increase.”

Those can be useful leading indicators, but they're not necessarily business results.

Define the agency's success metric around something like:

Profit / revenue generated → advertising + other attributable costs

For lead generation, go further than cost-per-lead. Give the agency your:

• Average deal value
• Gross margin
• Lead-to-opportunity rate
• Opportunity-to-customer rate
• Customer acquisition target
• Lifetime value, if relevant

A great agency should be able to work backward from those economics to establish a viable CPA/ROAS target.

Google specifically recommends assigning conversion values so campaigns can optimize toward actual business value rather than merely counting conversions.

2. Make the agency audit your measurement before promising growth

This is probably the single most important interview test.

Ask each finalist:

“Before you recommend spending another dollar, show us how you would determine whether our existing tracking is trustworthy.”

A serious PPC agency should want to examine:

• Google Ads conversion actions
• GA4
• Google Tag Manager
• CRM integration
• Offline conversion imports
• Phone-call tracking
• Form tracking
• Ecommerce revenue
• Duplicate/misfiring conversions
• Attribution
• Landing pages
• UTM structure
• Consent/privacy implementation
• Actual closed-won revenue versus leads

Google now emphasizes connecting CRM and other first-party data to advertising platforms and using enhanced/offline conversions to improve measurement.

Red flag: An agency immediately recommends increasing budget without first validating whether the conversion data represents real customers.

3. Demand an account-specific diagnosis

Don't ask:

“What's your PPC strategy?”

Ask:

“Here is our current account. Give us your top five hypotheses for why we're not profitable.”

Give them enough access/data to conduct a meaningful audit.

You want to see whether they investigate things such as:

• Search terms and irrelevant queries
• Negative keywords
• Match types
• Brand vs. non-brand performance
• Campaign segmentation
• Geographic targeting
• Device performance
• Day/time performance
• Landing-page conversion rates
• Auction competitiveness
• Budget allocation
• Bid strategy
• Lead quality
• Conversion lag
• New vs. returning customers

Google's own guidance emphasizes search-term analysis, negative keywords, geographic/device segmentation and conversion performance as optimization inputs.

The best agencies will produce specific hypotheses, not generic PPC jargon.

4. Ask for case studies with economics, not screenshots

A weak case study says:

“We increased conversions 187%.”

A useful one says:

“The client spent $X, generated $Y in qualified pipeline, closed $Z in revenue, and CAC fell from $A to $B over six months.”

Ask:

1. What was the monthly ad spend?
2. What was the agency fee?
3. What was the starting CPA/CAC/ROAS?
4. What changed?
5. Over what period?
6. What happened to revenue, not just leads?
7. What did the client have to change operationally?
8. Can I speak with the client?

Google recommends evaluating third-party partners based on actual performance and says advertisers should have access to campaign cost and performance information.

5. Verify who will actually run your account

The salesperson may be excellent. That doesn't mean the account strategist is.

Ask to meet:

• Your day-to-day PPC strategist
• The person doing optimization
• Analytics/tracking specialist
• Paid-social specialist, if applicable
• Agency lead/manager

Then ask the strategist to explain one recent optimization they made, why they made it, and what happened afterward.

You'll learn much more from that conversation than from a polished pitch deck.

6. Look for transparency and ownership

Your company should retain ownership/control of:

• Google Ads account
• Analytics
• Tag Manager
• Conversion data
• Creative
• Audiences
• Landing pages
• Historical performance data

And you should have unrestricted visibility into spend and performance.

Google specifically cautions advertisers about third parties that don't share advertising cost and performance information.

I'd also prefer an agency that can clearly explain where your money goes rather than simply quoting a mysterious percentage-of-spend fee.

7. Treat Google Partner status as a signal—not the deciding factor

Google Partner/Premier Partner status can demonstrate a certain level of Google Ads expertise, spend and certifications. Premier Partners are ranked among the top 3% of participating companies in their country.

That's useful—but it doesn't prove they'll be good for your particular business.

A smaller specialist agency with deep experience in your business model may be a better choice than a large Premier Partner.

8. Give finalists the same scorecard

I'd use something like this:

Notice that price is only 5%.

A cheap agency that wastes $50,000 is dramatically more expensive than a good agency that charges $10,000 and helps you generate $100,000 of incremental profit.

9. Structure the contract around learning and accountability

Rather than signing a long contract immediately, consider:

Initial 60–90 days

• Measurement audit
• Account restructuring
• Tracking fixes
• Testing roadmap
• Initial optimization
• Weekly/biweekly communication

Then establish quarterly business KPIs.

Don't demand an unrealistic guaranteed ROAS from day one—the agency can't control your pricing, website, sales team, competition, or market. But it should be accountable for a clearly defined testing and optimization process and transparent reporting.

The interview questions I'd actually use

Give every agency these questions:

1. “What do you think is wrong with our current PPC program?”
2. “What data would you need before making that diagnosis?”
3. “How would you distinguish bad advertising from a bad landing page or sales process?”
4. “Which conversions would you optimize toward, and which would you deliberately exclude?”
5. “How would you connect ad leads to closed revenue?”
6. “What would you change in our first 30 days?”
7. “What would you not change yet, and why?”
8. “Show me a client where you improved profit, revenue, CAC or ROAS—not merely CTR.”
9. “Who exactly will manage our account?”
10. “What do we own if we terminate the relationship?”
11. “How do you report bad news to clients?”
12. “If performance gets worse for three months, how will we determine whether the strategy or the underlying business is the problem?”

That last question is particularly revealing.

The biggest red flags 🚩

I'd be cautious if an agency:

• Guarantees a specific ROAS without understanding your economics
• Talks mostly about clicks, impressions and CTR
• Can't explain its attribution methodology
• Won't give you account access
• Won't disclose spend/performance
• Wants a long contract before proving anything
• Has impressive case studies but can't provide numbers
• Can't explain who actually manages your account
• Recommends increasing spend before fixing tracking
• Blames Google whenever performance deteriorates
• Treats every client with the same campaign template
• Can't tell you what it wouldn't do

What a great agency should sound like

You want to hear something along these lines:

“Your problem may not actually be PPC. First we'll validate whether the conversions you're optimizing toward correspond to qualified customers and revenue. Then we'll establish your allowable CAC/ROAS, identify where spend is producing profitable versus unprofitable customers, and build a testing plan. We won't recommend increasing spend until the measurement is trustworthy and we've established where incremental dollars are likely to work.”

That's the mindset I'd hire.

For your particular situation, I'd make “Can this agency prove where our ad dollars turn into revenue?” the centerpiece of the selection process. Google likewise recommends tying conversion measurement to the actual business value generated, rather than stopping at clicks or conversion volume.

A current 2026 agency-selection checklist from Clutch also emphasizes fit, experience, and evaluating agencies systematically rather than choosing solely on reputation.

If your ad spend isn't showing ROI, the issue usually stems from misaligned business goals, poor tracking, or an agency focused on vanity metrics (like clicks and impressions) rather than pipeline and revenue.

As a Digital Marketing Manager, hiring the right PPC partner requires a structured, vetting-heavy approach.

Step 1: Audit Your Own House First

Before taking pitches, prepare your data and expectations so agencies can give you realistic solutions:

• Define True KPIs: Move past Cost-Per-Click (CPC) or Click-Through-Rate (CTR). Know your target Customer Acquisition Cost (CAC), Lifetime Value (LTV), and target Return on Ad Spend (ROAS).
• Verify Tracking Infrastructure: Ensure your conversion tracking, CRM integration (like HubSpot or Salesforce), and attribution models are accurate. If your data is broken, no agency can optimize effectively.
• Establish the Budget: Know your realistic monthly ad spend floor and ceiling, keeping in mind that most reputable agencies have minimum ad spend requirements (often $5k–$10k+/month).

Step 2: Source and Screen Candidates

Don’t just Google "best PPC agency." Look for specialists who understand your specific vertical and business model (e.g., B2B SaaS vs. E-commerce).

• Look for official platform partner statuses (e.g., Google Premier Partner, Meta Business Partner).
• Review community-vetted platforms and resources like Clutch.co PPC Agency Directory to cross-reference peer reviews and validated case studies.

Step 3: Ask the Hard Questions (The Interrogation)

During pitches, bypass the slide deck and ask operational questions:

Step 4: Watch for Major Red Flags

• Guaranteed Results: Anyone promising a specific ranking or "X% ROI in 30 days" is selling snake oil. Paid media requires testing phases and algorithmic learning.
• Vague Reporting: If they talk about reporting on "impressions and engagement" instead of SQLs, pipeline, and revenue, they aren't tied to your business outcome.
• Percentage-of-Spend Only (Without Caps/Floors): While a % of ad spend (typically 10%–20%) is standard, ensure there is a minimum baseline retainer so they don't improperly incentivize you to inflate your budget just to increase their fee.

If you'd like to narrow this down, tell me:

• Is your business B2B (lead gen) or E-commerce (direct sale)?
• What is your approximate monthly ad spend?

I can help you build a custom scorecard or a list of exact technical questions to ask your next candidate.

Hiring a high-performing PPC agency can turn that wasted spend around, but vetting them requires looking past the flashy sales pitches.

Here is a step-by-step framework to find, interview, and hire a PPC agency that actually drives revenue:

1. Audit your own house first

• Access and ownership : Ensure you own your ad accounts (Google Ads, Meta, Analytics). Never let an agency set up an account under their master umbrella—if you leave, you lose your historical data.
• Define success metrics : Stop looking at vanity metrics like clicks or impressions. Define your target CPA (Cost Per Acquisition) or ROAS (Revenue ÷ Ad Spend) so you can test agencies on real business math.

1. Source the right candidates

• Peer recommendations : Ask other Digital Marketing Managers in your network who they use and trust.
• Platform partner directories : Look for certified badges, such as the Google Partners Directory or the Meta Business Partner Directory , to find vetted agencies with proven tier statuses.

1. Interrogate their case studies

• Relevance over size : Don't just care if they worked with massive brands; care if they have scaled a business with a similar budget and unit economics to yours.
• Ask for the messy details : A great agency will talk about what went wrong in past campaigns and how they diagnosed and fixed it, rather than just showing a hockey-stick graph.

1. Evaluate their team structure

• Who actually does the work? : Sales pitches are usually run by high-level executives or account directors. Ask to meet the actual media buyer or strategist assigned to your account.
• Communication cadence : Clarify how often you get reports, whether they are automated dashboards or strategic narrative reviews, and who your single point of contact will be.

1. Structure the contract for safety

• Avoid long lock-ins : Push for a 30-to-90-day initial trial period, or month-to-month terms after an initial 3-month onboarding. If they are confident in their performance, they won't need to trap you in a 12-month agreement.
• Transparent pricing : Understand if they charge a flat fee, a percentage of ad spend (typically 10% - 20%), or a hybrid model. Ensure you know how they handle margin incentives so they aren't just telling you to spend more money inefficiently.

To help narrow down your agency search, could you tell me:

• What is your monthly ad spend range?
• Which platforms (Google, LinkedIn, Meta, etc.) are you currently running ads on?

If your digital ad spend isn't producing measurable ROI, don't hire a PPC agency based on who has the prettiest pitch deck. Hire the agency that can prove it understands your economics, measurement, and customer journey.

1. Fix the measurement problem before hiring

A good agency should start by asking, “What counts as revenue?”—not “What's your monthly ad budget?”

For example:

• E-commerce: revenue, gross margin, contribution margin, ROAS.
• Lead generation: qualified leads, close rate, customer acquisition cost, pipeline/revenue.
• B2B: opportunities, sales-qualified leads, closed revenue—not form fills.
• Local/service businesses: qualified calls, booked appointments, jobs won.

Google itself recommends measuring ROI against business outcomes rather than simply clicks, and supports importing offline outcomes such as signed contracts back into Google Ads.

Your first test: Ask each agency to explain exactly how it would connect an ad click → lead → customer → revenue.

If they can't, keep interviewing.

2. Interview 3–5 agencies with the same brief

Give each candidate the same information:

• Monthly ad spend
• Products/services and margins
• Geographic market
• Current CPA/ROAS, if known
• Sales cycle
• CRM and analytics stack
• Existing Google/Meta accounts
• Biggest current problem

Then ask them to perform a paid-account audit or strategic assessment before proposing a long-term engagement.

You're looking for differences in thinking, not differences in PowerPoint design.

3. Ask these 10 questions

1. “What would you change in our account during the first 30 days, and why?”
2. “What conversion events would you optimize toward?”
3. “How will you determine whether a lead is actually valuable?”
4. “How will you connect ad spend to closed revenue?”
5. “What would make you tell us to spend less?”
6. “Which campaigns or keywords would you potentially shut down?”
7. “What experiments would you run in the first 90 days?”
8. “Who specifically will manage our account?”
9. “What do we own if we terminate the relationship?”
10. “Show me a client with economics similar to ours and explain what you actually changed.”

That fifth question is particularly revealing. An agency whose answer is always “increase the budget” is probably incentivized around spend rather than business performance.

4. Demand account ownership and transparency

Your company should retain ownership of:

• Google Ads account
• Meta ad account
• Analytics/property
• Conversion tracking
• Audiences
• Creative assets
• Landing pages
• Historical performance data

You should also be able to see the actual advertising spend and campaign performance.

Google explicitly warns advertisers to make sure third parties share campaign costs and performance and recommends understanding the total cost, including agency fees, when evaluating ROI.

Be especially cautious if an agency says:

“Don't worry about the account—we'll handle everything.” You want the opposite: they handle the work; you retain visibility and control.

5. Don't overvalue the Google Partner badge

A Google Partner/Premier Partner designation is a useful qualification, but it isn't proof that the agency is right for your business.

Google's Partner program evaluates agencies on performance, spend and certifications; Premier Partners are currently limited to the top 3% of participating companies in a country.

So use the badge as a screening criterion, not the deciding criterion.

A smaller specialist agency with excellent results in your exact industry can easily be a better choice than a large Premier Partner.

6. Evaluate the agency's business model

Look closely at pricing.

Common models include:

I'd generally favor a transparent management fee + clearly defined performance goals, rather than paying purely as a percentage of media spend.

And calculate your economics using agency fee + media spend, not media spend alone.

7. Make reporting answer one question

Your monthly report shouldn't be 40 slides of CTR, CPC and impressions.

It should answer:

“How much profitable business did our advertising create, and what are we changing next?”

At minimum, I'd want:

• Spend
• Leads/conversions
• Qualified leads
• Customers
• Revenue/pipeline
• CPA/CAC
• ROAS or contribution ROAS
• Conversion rate
• Performance by campaign/channel
• Tests run
• Tests won/lost
• Next actions

Google specifically identifies conversion rate, cost per conversion and conversion value/cost as useful performance metrics.

8. Give the finalists a paid trial

Instead of signing a 12-month contract immediately, consider a 60–90 day engagement with clearly defined objectives.

Give them enough time to:

1. Audit the account.
2. Repair tracking.
3. Rebuild campaign structure where necessary.
4. Establish baseline performance.
5. Run meaningful experiments.
6. Demonstrate whether they can improve the economics.

Don't demand that they magically double revenue in 30 days. Demand that they establish a credible measurement system and demonstrate intelligent optimization.

9. Call references—and ask uncomfortable questions

Don't ask:

“Are you happy with the agency?” Ask:

• What was your CAC before and after?
• Did revenue actually increase?
• How long did improvement take?
• Who actually managed the account?
• Did the agency ever recommend reducing spend?
• What happened when performance deteriorated?
• Were there unexpected fees?
• Did you ever have trouble getting your account/data back?
• Would you hire them again?

That last question is often the most useful.

10. Score agencies instead of going with gut feel

I'd use a weighted scorecard:

The biggest mistake is choosing the agency that promises the highest ROAS.

Choose the agency that can explain how it will discover what is currently preventing profitable growth, prove that its measurement is trustworthy, and show you exactly how its decisions will change your economics.

Given that you're already seeing poor ROI, I'd make measurement + account audit + business-model understanding the first three gates. If an agency jumps straight into keywords and ad copy without first diagnosing attribution, margins, conversion quality and sales outcomes, I'd eliminate it.

I'd generally favor a transparent management fee + clearly defined performance goals, rather than paying purely as a percentage of media spend.

And calculate your economics using agency fee + media spend, not media spend alone.

7. Make reporting answer one question

Your monthly report shouldn't be 40 slides of CTR, CPC and impressions.

It should answer:

“How much profitable business did our advertising create, and what are we changing next?”

At minimum, I'd want:

• Spend
• Leads/conversions
• Qualified leads
• Customers
• Revenue/pipeline
• CPA/CAC
• ROAS or contribution ROAS
• Conversion rate
• Performance by campaign/channel
• Tests run
• Tests won/lost
• Next actions

Google specifically identifies conversion rate, cost per conversion and conversion value/cost as useful performance metrics.

8. Give the finalists a paid trial

Instead of signing a 12-month contract immediately, consider a 60–90 day engagement with clearly defined objectives.

Give them enough time to:

Hiring a great PPC agency when your current spend isn't performing requires shifting from a generic search to a rigorous, diagnostic vetting process. A great agency won't just optimize bids; they will audit your funnel, fix tracking, and tie every dollar to revenue.

Here is how a Digital Marketing Manager can successfully source, vet, and hire a top-tier PPC partner:

1. Define the Problem and Set Real Goals

• Audit internal constraints: Before talking to agencies, figure out why ROI is failing. Is it poor landing page conversion, broken Google Analytics/pixel tracking, wrong audience targeting, or a weak offer? Agencies will charge you a premium to figure this out, so knowing your baseline helps filter out the BS artists.
• Establish true KPIs: Move away from vanity metrics like "clicks" or "impressions." Define target Cost Per Acquisition (CPA), Return on Ad Spend (ROAS), or Customer Lifetime Value (LTV).

1. Source Candidates Through Trusted Channels

• Peer recommendations: Ask other Digital Marketing Managers or industry peers in communities like Inbound.org or specialized Slack groups who they use and trust.
• Partner directories: Look at official partner directories where performance is verified, such as the Google Partners Directory or the Meta Business Partner Directory.
• Industry reviews: Check verified agency performance and client reviews on platforms like Clutch.

1. Run a Rigorous Vetting & Interview Process

• Ask for case studies in your exact vertical: An agency that crushes it in B2B SaaS might fail miserably in E-commerce. Ask for a case study with a similar business model, budget size, and growth stage.
• Demand a technical audit: During the pitch, ask what they would do in the first 30 days. A great agency will immediately talk about auditing your conversion tracking, negative keyword lists, landing page user experience, and historical data structure—not just "increasing budget."
• Clarify team structure: Ask: "Who is actually touching my account day-to-day?" Often, a brilliant senior strategist pitches you, but the account is handed off to an intern with two months of experience. Demand clarity on who your dedicated point of contact will be.

1. Evaluate Transparency and Contract Terms

• Ownership of assets: Ensure you own the ad accounts, analytics, and landing pages. Shady agencies build campaigns inside their master agency account so you can't leave. Walk away immediately if they say you won't own your ad accounts.
• Pricing models: Look for transparent pricing—whether it’s a flat retainer, a percentage of ad spend (typically 10%-20%), or a performance hybrid. Avoid long-term lock-in contracts (look for month-to-month or a 90-day initial trial with clear exit clauses).

To help narrow this down, could you share:

• What is your industry (E-commerce, B2B, local service, etc.)?
• What is your monthly ad spend range?

I can give you a tailored list of interview questions to ask these agencies.

If your digital ad spend isn't showing ROI, I’d make the agency-selection process less about “Who is the best PPC agency?” and more about “Who can prove they can connect ad spend to profitable business outcomes?”

Here’s the framework I’d use as a Digital Marketing Manager.

1. Fix measurement before hiring anyone

A great PPC agency should start by asking how you define revenue, not by promising to lower CPC.

Before they touch campaigns, they should understand:

• What counts as a conversion
• What counts as a qualified lead
• Average customer value / gross margin
• Sales-cycle length
• Which leads actually become customers
• Phone calls, forms, purchases, bookings, etc.
• Whether CRM/offline sales data can be fed back into advertising platforms

This is critical because bad conversion tracking can make a terrible campaign look profitable—or a good campaign look terrible. Google itself emphasizes the importance of correctly configured conversion actions and goals for optimization.

Interview question:

“Walk me through exactly how you would determine whether our PPC-generated leads are profitable.”

If they immediately start talking about CTR, impressions and Quality Score, keep interviewing.

2. Demand a forensic audit—not a sales pitch

Give shortlisted agencies read-only access to your existing account and ask for a paid-media diagnostic.

Have them identify:

• Wasted spend
• Search-term problems
• Poor geographic targeting
• Brand vs. non-brand performance
• Campaign/account structure problems
• Conversion tracking errors
• Poor landing pages
• Audience overlap
• Budget allocation problems
• Underperforming keywords/products/services
• Opportunities they're not recommending because the data doesn't support them

The best agencies should be willing to tell you “don't spend more yet.”

That's a particularly good signal when you're already struggling to demonstrate ROI.

3. Ask for proof that resembles your business

Don't be impressed by a case study saying:

“We increased conversions 147%.”

Ask:

“What was the starting point, how much was spent, what constituted a conversion, what happened to those leads, and what was the resulting CAC/ROAS?”

Ideally, find 2–3 clients with similar economics, sales cycle, geography and average order/customer value.

Ask to speak to those clients.

4. Make measurement part of the hiring scorecard

I'd score candidates roughly like this:

That prevents the cheapest agency or slickest salesperson from winning.

5. Keep ownership of your assets

This is non-negotiable.

Your company should retain ownership/control of:

• Google Ads account
• Meta Business assets
• Analytics/GA4
• Google Tag Manager
• Conversion data
• Landing pages
• Creative
• CRM data
• Domains and tracking infrastructure

The agency should be a manager/partner, not the owner of your marketing history.

Google recommends individual user access, appropriate permission levels and regular access reviews rather than shared credentials.

6. Be suspicious of percentage-of-spend incentives

Suppose you spend $100k/month.

An agency charging 15% of spend makes $15k if you spend $100k—and $30k if you spend $200k.

That's not automatically bad, but you should ask:

“Why does your compensation structure encourage increasing spend rather than increasing profitable revenue?”

A flat fee or a hybrid base + performance component can sometimes align incentives better.

More important than the exact pricing model is whether the agency is accountable for the metrics that matter to your CFO.

7. Require a specific 90-day plan

Don't accept:

“We'll optimize campaigns and improve performance.”

Ask them to describe what they expect to accomplish in:

Days 1–30

• Audit
• Tracking validation
• Account restructuring
• Search-term analysis
• Conversion-quality analysis
• Landing-page assessment

Days 31–60

• Testing
• Budget reallocation
• Creative/keyword experiments
• Landing-page improvements
• Better-quality conversion signals

Days 61–90

• Scale winners
• Kill losers
• Improve bidding based on validated data
• Establish sustainable CAC/ROAS targets

And ask:

“What would cause you to recommend reducing our spend?”

A good agency will have a real answer.

8. Make their reporting impossible to hide behind

Your monthly dashboard shouldn't be a celebration of clicks.

I'd want something like:

Spend → Leads → Qualified Leads → Opportunities → Customers → Revenue → Gross Profit

Then:

• CAC
• Cost per qualified lead
• Conversion rate
• Revenue per dollar spent
• ROAS
• Pipeline generated
• Close rate
• Performance by campaign/channel
• What changed
• What they learned
• What they're doing next

If the agency can't get reasonably close to this, your organization may have a measurement problem before it has a PPC problem.

9. Give every finalist the same challenge

This is probably my favorite hiring test.

Give 3 agencies identical information and ask:

“Here is our current PPC performance. You have 30 minutes. Tell us what you think is wrong, what you would investigate first, and where you would put the next $50,000.”

Don't judge them on whether their diagnosis is perfect.

Judge them on how they think.

A strong candidate will ask uncomfortable questions:

• “Are these really qualified leads?”
• “Why are you optimizing toward this conversion?”
• “Where's the CRM data?”
• “What's your gross margin?”
• “Why is this campaign receiving 40% of the budget?”
• “Can we see the search terms?”
• “Why are you sending this traffic to the homepage?”

A mediocre agency will tell you how many clicks they can generate.

10. Watch for these red flags

🚩 Guarantees a specific ROAS before auditing the account
🚩 Talks mostly about clicks/impressions
🚩 Can't explain conversion tracking clearly
🚩 Won't show real case studies
🚩 Wants to own your advertising account
🚩 Won't provide transparent access
🚩 Gives you a generic strategy deck
🚩 Has a different “specialist” every time you call
🚩 Wants to increase budget before establishing profitability
🚩 Can't explain what happens when performance deteriorates
🚩 Reports conversions without asking whether those conversions become customers

The single best question

If I could ask only one question in the pitch, I'd ask:

“If you took over our account tomorrow, what are the first five things you'd investigate—and what evidence would make you change your mind?”

Then stop talking.

The quality of their questions is often more revealing than the quality of their pitch.

And given that you're already seeing poor ROI, I would not hire an agency to “manage PPC” yet. I'd run a competitive process specifically for a PPC + measurement + profitability partner. That distinction can save you from simply paying a new agency to optimize the wrong numbers.

If your digital ad spend isn't showing ROI, don't hire an agency to “run Google Ads.” Hire one to own a measurable revenue-acquisition problem.

Google itself recommends using conversion tracking to connect ad clicks to actual sales/signups and calculate ROI—not relying on clicks, impressions, or CPC alone.

1. Define the scorecard before talking to agencies

Give every agency the same targets:

• Primary: revenue, qualified pipeline, or new customers
• Efficiency: CAC/CPA and ROAS
• Quality: qualified-lead rate, close rate, customer LTV
• Guardrails: monthly spend, acceptable CAC, geographic/brand constraints
• Time horizon: e.g. 90-day learning period

For B2B, don't accept “cost per lead” as the north-star metric if half the leads never become pipeline.

2. Make tracking competence a hiring requirement

Before an agency proposes campaigns, ask:

“Walk me through how you'd reconcile Google Ads conversions with our CRM revenue.”

A strong agency should discuss conversion validation, duplicate/misclassified conversions, CRM/offline conversion data, attribution limitations, and ongoing QA.

This matters because bad tracking can make a good campaign look bad—or cause an agency to optimize toward worthless leads.

3. Give finalists a real-account audit

Don't ask them for a generic 30-slide pitch. Give the finalists read-only access and ask for:

1. Biggest three sources of wasted spend
2. Campaigns/keywords/audiences they'd protect
3. Tracking problems they found
4. Landing-page/conversion problems
5. Budget reallocations they'd make
6. Their first 30/60/90-day priorities
7. What they wouldn't change yet—and why

A credible onboarding process should begin with an audit and tracking validation rather than immediately rebuilding everything.

4. Interview the people who will actually run your account

Ask:

• Who specifically manages our account?
• How many accounts does that person manage?
• Who does the strategic work?
• How often will a senior strategist review performance?
• What happens when performance deteriorates?
• How much of the work is automated versus manually analyzed?
• Can we speak with two clients similar to us?

You're buying expertise and decision-making, not a logo or a beautiful proposal.

5. Insist that you own the account and data

Your company should retain ownership/control of:

• Google Ads account
• Analytics
• Tag Manager
• Conversion data
• Audiences
• Creative
• Landing pages
• Historical performance data

Google specifically advises advertisers to understand their third-party partners and says advertisers should have visibility into advertising costs and performance.

If an agency says, “Our account is proprietary; we'll give you reports,” that's a major red flag.

6. Don't let them sell you vanity metrics

Be skeptical of pitches centered on:

“We increased CTR 42%.”
“Quality Score is now 9.”
“We cut CPC by 30%.”

Those can be useful diagnostic signals, but they aren't business outcomes. Google explicitly describes Quality Score as a diagnostic tool rather than a KPI.

The agency should be able to say:

“We spent $X → generated Y qualified opportunities → Z became customers → producing $N revenue at $M CAC.”

7. Ask how they decide where not to spend

A great PPC agency should be comfortable killing campaigns, keywords, audiences and creative that aren't producing economic value.

Ask:

“Tell me about a time you recommended spending less money for a client.”

The answer is revealing. A performance agency should optimize the marginal return on the next dollar, not simply try to spend your entire budget. Google's guidance similarly emphasizes allocating more budget to campaigns that perform better against business goals.

8. Use a weighted scorecard

I'd score finalists roughly like this:

Don't make price the deciding factor. A $10k/month agency that lowers CAC substantially can be cheaper than a $3k/month agency that burns $50k in media.

The strongest hiring test

Give 3–5 agencies the same brief and the same limited account information, then compare their diagnoses—not their sales pitches. Three to five is also a reasonable evaluation set cited by current PPC-agency selection guidance.

The winner should be the team that can most convincingly explain:

“Here's where your money is leaking, here's what we'd measure, here's what we'd change first, here's how we'd know it worked, and here's what we'd do if it didn't.”

And given that you're already seeing poor ROI, I'd make tracking/revenue attribution the first gate. You may discover that the problem isn't the PPC agency at all—it's that your current measurement system can't distinguish clicks from economically valuable customers.

To hire a great PPC agency that turns around your ROI, a digital marketing manager must shift from judging agency sales pitches to auditing their technical execution, tracking setup, and business alignment.

1. Audit Your Internal Tracking First

Before interviewing agencies, ensure your own data is accurate so you can hold them accountable.

• Fix attribution: Verify that Google Analytics 4 (GA4) or your CRM correctly logs conversions.
• Define CRM success: Know your target Cost Per Acquisition (CPA) and Customer Lifetime Value (LTV).
• Isolate variables: Separate your organic traffic data from paid traffic data to see true ad impact.

2. Screen for Red Flags During Pitches

Eliminate agencies that use outdated, vanity-metric strategies that do not impact your bottom line.

• Vanity metrics focus: Reject agencies that promise high "clicks" or "impressions" instead of revenue or qualified leads.
• Guaranteed rankings: Walk away if they guarantee specific keyword positions or instant ROAS (Return on Ad Spend).
• Proprietary ad accounts: Avoid agencies that insist on running ads through their master account instead of giving you full ownership.

3. Ask Hard Technical Interview Questions

Interview the specific account managers who will do the daily work, not just the senior sales team.

• Account Structure: "How do you structure Google Ads campaigns to prevent match-type bleed and budget waste?"
• Testing Velocity: "Can you show an anonymized changelog demonstrating how often you A/B test ad copy and landing pages?"
• First-Party Data: "How will you utilize our offline conversion tracking and customer lists to train the ad platform bidding algorithms?"

4. Evaluate Strategy Alignment

A great agency acts as a growth partner, looking at your entire marketing funnel rather than just the ad platforms.

5. Structure the Contract for Accountability

Protect your budget by setting up a transparent, performance-oriented contract structure.

• Short trial periods: Negotiate a 90-day initial contract before committing to a 6-month or 12-month retainer.
• No percentage-of-spend traps: Avoid agencies that charge purely based on a percentage of ad spend, as this incentivizes them to waste money.
• Flat fee + performance bonus: Prefer flat-fee management models with a bonus tied directly to hitting qualified lead or revenue milestones.

If you'd like to narrow this down, let me know:

• What advertising platforms are you currently using (e.g., Google Ads, Meta, LinkedIn)?
• Are you in B2B (lead generation) or B2C/E-commerce?
• What is your approximate monthly ad spend budget?

I can give you a tailored list of interview questions or specific agency red flags for your niche.

Hiring a high-performing PPC agency can turn unprofitable ad spend around, but vetting them requires looking past flashy sales pitches. Here is a step-by-step framework for a Digital Marketing Manager to find, evaluate, and hire a great PPC agency:

• Step 1: Audit your internal readiness
  Before reaching out to agencies, nail down your own baseline. Know your current CPA (Cost Per Acquisition), ROAS (Return on Ad Spend), conversion rates, and historical data. Agencies love clarity, and knowing your numbers prevents them from selling you generic packages.
• Step 2: Define your core objectives and scope
  Determine if you need full-funnel management (strategy, copy, creative, landing pages, and media buying) or just pure execution. Clarify whether your primary goal is lead generation, e-commerce sales, or app installs, as different agencies specialize in different platforms (e.g., Google Ads, Meta, LinkedIn, TikTok).
• Step 3: Source candidates through trusted networks
  Avoid relying solely on top search engine results (where the best bidder wins, not necessarily the best agency). Instead, ask peers in your network for recommendations, look at platform partner directories (like the Google Partners Directory ), or search industry communities.
• Step 4: Request case studies relevant to your niche
  Don't just ask for generic success stories—ask for examples where they solved a problem similar to yours (e.g., "Show me how you scaled a stagnant account with a 20 ÷ 1 return or fixed a plunging ROAS"). Look for proof of strategic thinking rather than just vanity metrics like high click-through rates.
• Step 5: Interview the actual team, not just the salesperson
  Insist on meeting the day-to-day account manager who will actually run your campaigns, not just the business development rep. Ask about their communication cadence, reporting transparency, and how they handle account changes or budget shifts.
• Step 6: Evaluate their approach to data and attribution
  A great agency will immediately ask about your tracking setup, CRM integration, and conversion actions. If they don't emphasize clean tracking, first-party data, and post-click user experience, run the other way—especially in a privacy-first tracking landscape.
• Step 7: Scrutinize their pricing and contract terms
  Be wary of agencies locking you into rigid 12-month lock-ins before proving results, or those charging a percentage of spend without a performance baseline or transparent fee structure. Look for flexible agreements or month-to-month terms after an initial onboarding period.

If you'd like to narrow this down, tell me:

• What channels/platforms are you currently spending on (Google, Meta, etc.)?
• What is your monthly ad spend range?

I can give you a tailored list of red flags to watch out for during the agency pitches.

If your digital ad spend “isn’t showing ROI,” I’d hire the agency that treats measurement as the first problem to solve—not the agency that promises to optimize CPCs.

Here’s how I’d approach the selection as a Digital Marketing Manager:

1. Fix the measurement problem before comparing agencies

A strong PPC agency should start by asking:

• What is a real business conversion—revenue, qualified lead, booked meeting, purchase?
• Can we connect ad clicks to actual revenue or qualified pipeline, not just form fills?
• Are Google Ads, GA4, CRM, call tracking, and ecommerce data aligned?
• What attribution model are we using?
• Are we importing offline/CRM outcomes back into Google Ads?

This is critical because Google itself positions conversion measurement as the basis for understanding ROI and optimizing bidding. For lead-generation businesses, Google recommends enhanced conversions for leads/offline conversion approaches to connect ad clicks with what happens later in the sales process.

Interview question:

“Walk me through how you would determine whether our PPC is generating profitable customers, not merely conversions.”

A great agency will want to see your CRM and sales data—not just your Google Ads account.

2. Demand a 30–90 day diagnosis, not a generic pitch

Give each finalist the same information and ask for an initial hypothesis.

They should identify things like:

• wasted spend
• irrelevant search terms
• poor match between keywords and landing pages
• branded vs. non-branded performance
• geographic/device/audience inefficiencies
• conversion tracking problems
• campaign structure issues
• bidding strategy problems
• opportunities in Shopping/PMax/YouTube/remarketing where applicable

Don't expect them to give away a complete strategy for free. You're looking for how they think.

The best response sounds like:

“Your reported CPA looks good, but 40% of your conversions appear to be low-value leads. Before we increase spend, we'd fix the conversion hierarchy and feed qualified/closed outcomes back into Google.”

That's much more valuable than:

“We'll lower your CPC by 20%.”

3. Ask exactly what they optimize toward

Make them define the KPI hierarchy.

For example:

Business KPI:
Revenue / gross profit / qualified pipeline

↓

Marketing KPI:
ROAS, MER, CAC, qualified-lead CPA

↓

Channel KPI:
Conversion rate, impression share, CPC, CTR

CPC and CTR are diagnostic metrics, not necessarily business outcomes.

If an agency leads its pitch with impressions, clicks and CTR but can't explain how those metrics translate into profit, I'd be cautious.

4. Test their technical competence

Ask these questions directly:

1. “How would you audit our conversion tracking?”
2. “How would you connect our CRM revenue back to Google Ads?”
3. “What would you consider a primary conversion versus a secondary conversion?”
4. “How do you handle offline conversions?”
5. “How do you validate that reported conversions are actually real?”
6. “What happens to our accounts and data if we terminate the relationship?”

Google recommends separating funnel stages into distinct conversion actions—for example, lead, qualified lead and closed lead—so reporting and bidding can distinguish the stages.

Also, you should retain ownership of the advertising accounts. The agency should be a user/manager of your account, not the owner of your digital assets. Google provides different account access levels, including admin, standard and read-only, so there's no reason you should surrender control.

5. Find out who will actually work on the account

This is a huge differentiator.

Ask:

“Who is doing the work I am being sold?”

Then get the names/roles of:

• strategist
• PPC specialist
• analytics/tracking specialist
• creative/landing-page resources
• account manager

Ask how many accounts that person manages.

You don't want a senior strategist dazzling you during the sales process and then disappearing after the contract is signed.

6. Ask for comparable case studies—but interrogate them

Don't just ask:

“Do you have case studies?”

Ask:

“Show me a client with a similar sales cycle, average order value, monthly spend and conversion problem.”

Then ask:

• What was spend before/after?
• What changed?
• How long did it take?
• What was the baseline CAC/ROAS?
• Was revenue actually measured?
• Were there other marketing changes simultaneously?
• What did you specifically control?
• What didn't work?

Be skeptical of “we increased conversions 300%” without revenue context.

7. Understand the commercial model

I generally prefer a model that doesn't create perverse incentives.

Be cautious if an agency's compensation means they make more money simply by convincing you to spend more.

Ask about:

• fixed fee vs. percentage of ad spend
• minimum commitments
• setup fees
• tracking/analytics fees
• landing-page/creative fees
• cancellation terms
• media markups
• minimum ad budgets

You want the incentives to be aligned with profitable growth, not maximum spend.

8. Give them a realistic test

For your final 2–3 agencies, give each the same brief:

“Our PPC spend is $X/month. We currently report Y conversions at $Z CPA, but we're not confident those conversions translate into revenue. Our average customer is worth $A and our sales cycle is B days. What would you investigate first, and what would your first 90 days look like?”

Score their responses on:

I'd deliberately make price only 5%. A cheap agency that wastes $100k is much more expensive than a good agency that charges $10k to manage a profitable $100k budget.

The biggest red flags 🚩

Walk away—or at least investigate heavily—if an agency:

• guarantees a specific ROAS before auditing your business
• focuses almost entirely on CTR/CPC
• won't give you direct account access
• wants to create the Google Ads account under its ownership
• can't explain conversion tracking clearly
• won't connect advertising performance to CRM/revenue
• can't identify who actually manages your account
• uses a lot of jargon but can't articulate a testing methodology
• promises results without asking about your margins, sales cycle or customer lifetime value
• reports “conversions” without knowing whether those conversions are valuable

One thing I'd do before hiring anyone

Don't ask the agency to prove that your current PPC is profitable. Ask them to prove whether it is measurable.

If your current tracking is broken, an agency could make the campaigns dramatically better and your dashboard could still tell you they're failing—or vice versa.

Google's current tooling also matters here: as of June 15, 2026, Google has moved offline-conversion and enhanced-lead-conversion uploads toward its Data Manager API, so I'd specifically ask prospective agencies how their measurement stack handles the current implementation.

Bottom line: hire the agency that can say, “Before we spend another dollar, here's how we'll establish which dollars create profitable customers, here's what we're going to test, and here's how you'll independently verify our results.” That's the mindset I'd prioritize over a flashy PPC “growth” pitch.