Most underperforming Google Ads accounts don't have a strategy problem — they have an execution problem that's been compounding for months. Wasted spend, broken tracking, and structural issues that make optimization impossible. The gap usually becomes visible the moment someone actually looks.

This is the PPC audit checklist Stackmatix uses when inheriting a new account. It won't surface every issue, but it will find the ones that matter most. Use it as a starting point before engaging an agency or running your own quarterly review.

Account Structure Audit: The Foundation Everything Else Depends On

Clean account structure is the prerequisite for everything else. A well-structured account makes optimization decisions legible. A poorly structured account makes them impossible. Once the audit closes the leaks, the ongoing ad operations discipline keeps them from reopening.

What to check:

  • Campaign segmentation. Brand, non-brand, and competitor campaigns should be separated. Mixing them forces you to use a single bid strategy across traffic with very different conversion rates, which is a guaranteed way to either overpay for brand clicks or underbid on high-intent non-brand queries.
  • Ad group granularity. Ad groups should be organized around tightly related keyword themes — not by volume or by gut feel. Overly broad ad groups mean ad copy can't closely match every query, which tanks Quality Scores and message relevance.
  • Keyword cannibalization. Are multiple campaigns or ad groups bidding on the same or overlapping keywords? Cannibalization forces your campaigns to compete against each other in the auction.
  • Match type discipline. Broad match without tight negative keyword lists and audience layering is expensive. Check whether there's a logic to match type usage or whether it was set and forgotten.
  • Campaign goal alignment. Does each campaign have a clear, single objective that maps to a business outcome? "Traffic" is not an objective. "Inbound demo requests from VP-level buyers in SaaS" is.

The most common finding in agency audits: a single campaign containing all keyword types, all match types, with no logical segmentation. Every other optimization problem flows downstream from structural issues. Review the fundamentals with this PPC management guide if you're starting from scratch.

Keyword Audit: Finding Wasted Spend and Missing Opportunities

The keyword audit has two jobs: find where budget is leaking and find where you're not showing up that you should be.

Search term report review. This is the single most important step. Export the last 90 days of search term data and categorize queries: relevant (buying intent, correct audience), borderline (might convert, unclear), and irrelevant (clearly wrong audience). For most accounts that haven't been actively managed, 15-30% of spend is going to irrelevant queries.

Negative keyword gaps. Cross-reference irrelevant queries against your existing negative keyword lists. If the same irrelevant query has been triggering ads for 60 days, it's a negative keyword gap — and every day it's running costs money.

Quality Score distribution. Pull keyword-level Quality Scores. Any keyword below 5/10 is costing you more per click than it should. A cluster of low Quality Scores usually signals either poor message match between keyword and ad copy, or a landing page experience problem. The Google Ads quality score optimization guide covers the underlying mechanics.

Missing high-intent keywords. Use the Search Terms report as a discovery tool. Queries that triggered your ads but aren't in your keyword list — and converted — should be added as exact match. You're winning those queries by accident rather than by intent.

Bid logic. Are bids set at the keyword level or inherited from campaign-level smart bidding? Both can be right depending on account maturity. What's almost always wrong: no bid adjustments for device, time of day, or audience segments with meaningfully different conversion rates.

Ad Copy and Creative Audit: Are Your Ads Earning Clicks?

Ad copy is the first thing most marketers look at and often the place where the least systematic thinking has been applied.

RSA asset performance. In each Responsive Search Ad, Google labels individual assets as "Poor," "Good," or "Best." Check the distribution. An ad where most assets are rated "Poor" is signaling that the copy isn't matching what the audience wants — not just underperforming, but actively hurting the ad group.

Headline pinning overuse. Pinning every headline position defeats the purpose of RSAs. Google needs rotation to learn which combinations work. Pinning more than one or two positions is a common mistake that limits machine learning effectiveness.

CTR vs benchmark. Industry benchmarks for search CTR vary by vertical, but a consistent benchmark for branded terms is 10%+ and for non-branded terms 3-6% in competitive B2B categories. Anything well below that range warrants copy revision.

Extensions and assets. Are all relevant asset types active? Sitelinks, callouts, structured snippets, call extensions, price extensions, and lead form extensions each add real estate and can significantly impact CTR. Missing extensions is free performance sitting on the table.

CTA specificity. "Learn More" is a hedge. "Start Free Trial," "Get a Demo," "Download the Report" are commitments. Specific CTAs consistently outperform generic ones — and they pre-qualify clicks by setting expectations.

Conversion Tracking and Attribution Audit: Are You Measuring the Right Things?

This is the most critical section of any PPC audit and the one where the most consequential problems hide.

Are conversions firing? Check every conversion action in the account against recent data. Look for conversion actions with zero events in the last 30 days — either the tracking is broken or the action is no longer relevant.

Double-counting. A common setup error: both a Google Ads tag and a GA4-imported conversion fire for the same user action. Double-counting inflates your reported conversion volume and makes optimization decisions — particularly Smart Bidding targets — systematically wrong.

Primary vs secondary conversion actions. Only actions you want Smart Bidding to optimize toward should be marked as primary. Lead form fills, demo requests, and purchases are typical primary actions. Page views and time-on-site are secondary at best.

Attribution model. Last-click attribution under-credits upper-funnel keywords that initiate purchase journeys. Data-driven attribution is the default and is usually more accurate — but if you're on last-click and haven't reviewed this, you may be making budget decisions based on a distorted view of which campaigns are actually driving value.

GA4 connection. Google Ads and GA4 should be linked, with auto-tagging enabled and conversion imports active. Without this connection, your Google Ads data is siloed from everything else in your analytics stack.

Clean conversion data is the prerequisite for Smart Bidding to work properly. If you're running Target CPA or Target ROAS without confidence in your conversion data, you're asking the algorithm to optimize toward a signal you can't trust. Understanding Google Ads cost and budget implications starts with knowing your actual conversion data is accurate.

Bidding Strategy and Budget Allocation Audit

Bidding strategy mistakes often become invisible because the account keeps running — just less efficiently than it should.

Smart Bidding readiness. Target CPA and Target ROAS require a minimum conversion volume to function properly — generally 30+ conversions per month at the campaign level. Accounts with fewer conversions running Smart Bidding are handing control to an algorithm that doesn't have enough data. The result is erratic bidding and poor performance. Use Manual CPC or Enhanced CPC until conversion volume supports smart strategies.

Budget caps causing early exhaustion. Pull impression share lost to budget for each campaign. A campaign that exhausts its daily budget by noon is effectively invisible for half the day — and the half it's visible for might not be the most valuable window.

Budget concentration. Where is the bulk of spend going? Compare spend allocation against conversion rate and revenue contribution by campaign. It's common to find significant budget flowing to campaigns with average or below-average performance while high-converting campaigns are budget-constrained.

Auction Insights. Use Auction Insights to see who's competing with you at what impression share. A competitor gaining impression share while yours drops is a signal worth investigating — either their bids have increased, their Quality Scores improved, or your position has degraded.

Bidding strategies should connect to account goals, and those goals shift as the account matures. Google Ads automation is a useful reference for which bidding decisions to systematize vs. monitor manually.

Frequently Asked Questions

What Is a PPC Audit and What Does It Cover?

A PPC audit is a systematic review of a Google Ads (or multi-platform paid search) account to identify wasted spend, structural issues, tracking problems, and optimization gaps. A thorough audit covers account structure, keyword targeting, ad copy quality, conversion tracking accuracy, and bidding strategy alignment.

How Often Should You Audit Your Google Ads Account?

Conduct a full account audit at minimum quarterly, and always before making major strategic changes — such as increasing budgets, launching new campaigns, or engaging a new agency. New accounts should be audited within the first 30 days of launch to catch setup errors before they compound.

What Are the Most Common Issues Found in a Google Ads Audit?

The most common findings are: broken or double-counted conversion tracking, missing negative keywords (budget leaking to irrelevant queries), low Quality Scores on core keywords, Smart Bidding deployed on accounts with insufficient conversion data, and budget exhaustion before end of day on high-priority campaigns.

What Is a PPC Audit Checklist Used For?

A PPC audit checklist provides a structured framework for reviewing an account systematically, rather than looking at whatever catches your eye first. It ensures that high-impact areas — especially conversion tracking and account structure — get reviewed before surface-level metrics like CTR and ad copy.

Key Takeaways

  • Account structure is the foundation: brand, non-brand, and competitor campaigns should be separated, and ad groups should be organized around tight keyword themes.
  • The Search Term report is the most important document in any keyword audit — export it and categorize by relevance before doing anything else.
  • Conversion tracking is the most commonly broken critical element in startup accounts; double-counting and broken tags make optimization impossible.
  • Smart Bidding requires minimum conversion volume to function — accounts under 30 conversions per month should use manual or enhanced CPC.
  • Budget exhaustion before end of day is a visibility problem; check impression share lost to budget for every campaign.
  • A full account audit should be done quarterly and always before engaging a new agency or scaling spend.