The Seduction of Performance Max
Performance Max is Google's darling. One campaign, all channels, automated everything. Set your budget, provide some assets, and let the machine work.
The results look incredible. Conversions flowing. ROAS climbing. Efficiency improving.
There's just one problem: half of what PMAX reports isn't what it seems.
The Brand Traffic Problem
Here's a pattern we see in every PMAX audit:
You set up Performance Max. Conversions start rolling in. The numbers look great. But dig into the search terms (when Google deigns to show them), and you'll find something uncomfortable.
30-50% of your "PMAX conversions" are branded searches.
People searching for your brand name. People who were already going to buy. People your Search campaigns should be catching at a lower cost.
Performance Max takes credit for these conversions because it's allowed to bid on everything, including your brand. And since branded traffic converts at 5-10x the rate of non-branded, it makes the campaign look phenomenal.
The Remarketing Mirage
The second hidden trick: PMAX loves your remarketing audiences.
Those display and video placements showing ads to people who already visited your site? They're inside Performance Max now. And when someone who was already considering a purchase finally converts, PMAX claims the credit.
Is this incremental revenue? Sometimes. Is it all incremental? Almost never.
The View-Through Conversion Con
Here's where it gets really creative.
Performance Max, by default, includes "engaged-view conversions" in its reporting. Someone watches 10 seconds of your YouTube ad, doesn't click, then converts through organic search two days later.
PMAX counts that as its conversion.
This isn't fraud—it's aggressive attribution that happens to make the campaign look better than it is. And unless you know to check, you'll never notice.
How to See the Truth
In our audits, we break down PMAX performance by:
- Isolating brand traffic (where possible) and measuring true non-branded performance
- Comparing PMAX launch to Shopping/Search cannibalisation - did conversions go up, or just shift?
- Reviewing view-through vs. click-through ratios - if >30% is view-through, there's a problem
- Analysing new vs. returning customer mix - is PMAX acquiring or just harvesting?
The real PMAX performance is usually 40-60% of what the dashboard shows. Still valuable, but not the miracle it appears.
What This Means for You
If your agency is reporting PMAX success without acknowledging these dynamics, they're either unaware or hoping you won't ask.
This is exactly what we examine in our audits. Not to trash Performance Max—it can work well when structured properly—but to understand what it's actually doing for your business.
Ready for an honest look at your Performance Max setup? Book a discovery call and we'll show you what's behind the numbers.