Performance Max promises to do the work for you, and that is exactly the problem. The automation hides what it is doing, so a campaign can look fine on the surface while quietly spending budget on your own brand traffic, junk placements, or low-value conversions. If you suspect your PMax is underperforming, you are usually right, you just cannot see why.
This checklist gives you 20 concrete checks to audit a Performance Max campaign. Work through them in order and you will know whether your PMax is genuinely driving incremental results or just taking credit for sales you would have won anyway.
Key Takeaways
- Most PMax problems hide behind the automation, so a structured audit is the only way to see what is really happening.
- Brand traffic is the most common waste: without exclusions, PMax often takes easy brand conversions and reports them as performance.
- Asset groups, audience signals, and exclusions are where the real control lives, not in the bid strategy alone.
- Conversion quality matters more than conversion count. Optimizing toward the wrong action makes good numbers that do not grow the business.
Before You Start
A Performance Max audit is only as good as the data behind it. Before judging performance, confirm the foundation is sound, because optimizing on broken tracking just scales the error. If your conversion tracking is shaky, fix that first with a proper tracking and measurement review, then come back to this checklist.
Conversion Tracking and Goals
- Is conversion tracking accurate and deduplicated? Confirm conversions fire once, with correct values, and are not double counting across tags.
- Are you optimizing toward the right action? A lead form and a sales-qualified lead are not the same goal. PMax optimizes toward whatever you tell it is valuable.
- Are conversion values passed, not just counts? Value-based bidding needs real values. Without them, PMax treats a €10 order like a €1,000 one.
- For lead gen, are offline conversions imported? Without CRM outcomes, PMax optimizes for cheap leads, not good ones.
Brand Traffic and Exclusions
- Are brand searches excluded? This is the single biggest PMax waste. Without brand exclusions, PMax harvests people already searching for you and reports it as performance. Apply account-level brand exclusions or request the brand exclusion controls.
- Are you measuring incrementality, not just last click? Ask whether PMax conversions would have happened anyway through brand or organic.
- Are irrelevant placements and content excluded? Check for spend leaking into low-quality apps, videos, and display placements.
Asset Groups and Creative
- Are asset groups themed by product or audience? One giant asset group for everything gives the algorithm no useful structure. Segment by product category or customer type.
- Is every asset slot filled with quality assets? Thin asset groups limit where PMax can serve and hurt performance.
- Are headlines and descriptions tested and refreshed? Stale creative decays. Check the asset performance ratings and replace low performers.
- Are high-quality images and video included? Without video, PMax auto-generates it, often poorly. Supply your own.
Audience Signals and Targeting
- Are audience signals provided and relevant? Signals guide the algorithm early. Strong first-party and intent signals speed up learning.
- Are you feeding first-party data where possible? Customer lists and high-value audiences sharpen targeting.
- Is geographic targeting set to presence, not interest? The default can serve to people merely interested in your location, wasting budget.
Budget, Bidding, and Structure
- Does the bid strategy match a realistic target? A target ROAS or CPA set too aggressively starves the campaign; set too loose, it overspends.
- Is the campaign out of the learning phase? Frequent changes reset learning. Confirm enough conversion volume and stability.
- Does PMax overlap or compete with your Search campaigns? Overlap can cannibalize your best search terms. Check how they interact.
- Is budget allocated by actual performance? Confirm spend is concentrated where returns are, not spread evenly by default.
Reporting and Visibility
- Are you using the channel and asset-level reports? Newer reporting exposes where spend and conversions actually come from. Use it to see inside the box.
- Is search-term and placement insight reviewed regularly? Even limited visibility reveals waste and new negative candidates.
Common Symptoms and What They Usually Mean
When you work through the checklist, most red flags map to a small set of root causes. This table connects the symptom you can see to the cause you usually cannot, so you know where to look first.
| Symptom you see | Likely cause | Where to fix it |
|---|---|---|
| Great ROAS, flat overall revenue | PMax is cannibalizing brand and organic conversions | Brand exclusions, incrementality view (checks 5 to 7) |
| Lots of conversions, poor lead quality | Optimizing toward a weak conversion action | Conversion goals and offline imports (checks 2 to 4) |
| High spend, low return in pockets | Budget leaking into low-value placements | Placement exclusions and channel report (checks 7, 19) |
| Volatile, unstable performance | Stuck in learning from frequent changes or thin assets | Asset groups and learning phase (checks 8 to 11, 16) |
What to Do With the Results
If your campaign fails more than a handful of these checks, the issue is rarely the bid strategy, it is the inputs: weak structure, missing exclusions, poor conversion quality, or thin creative. Fix those, give the campaign time to relearn, and re-audit. Treat the checklist as a loop, not a one-time pass: the accounts that hold their performance are the ones that run this review on a schedule and act on what it surfaces.
The deeper pattern behind most PMax problems is the same one that affects every campaign type: spend chasing the wrong signal. If you want a broader view, our Google Ads audit checklist covers the whole account, and our wasted spend audit guide focuses specifically on finding where budget leaks.
If you would rather have an expert do it, we run a focused Performance Max audit as part of our Google Ads management service. Book a free audit and we will show you exactly what your PMax is doing behind the automation, and what to fix first.
Sources
- Google Ads Help Center – About Performance Max campaigns
- Google Ads Help Center – Performance Max reporting and brand exclusions
- Barefoot Performance Marketing – direct Performance Max management experience