Performance Max: when it works and when it wastes your budget
Performance Max works well for online stores with a clean product feed and correct order trackingbut wastes your budget, when you launch it on broken tracking or leave it to swallow your branded searches. Performance Max is the Google campaign type that shows your ads at the same time across seven channels: Search, Shopping, the Display Network, YouTube, Gmail, Discover and Maps, with one shared goal and almost no manual control over exactly where the budget goes. It is this missing control that makes the difference from a Search campaign and the reason growth is measured separately from branded traffic. The check is whether orders are growing, not reported conversions.
My name is Hristiyan Panov — a performance marketing consultant with over 5 years’ experience and over €2 000 000 I have managed advertising budgets for over 90 companies on Google and Meta. Below, I explain when Performance Max is worth it, when it isn’t, and what I check before launching such a campaign on a client’s account.
What makes Performance Max different from a Search campaign?
With a Search campaign, you choose the keywords and can see what you’ve paid for each query. With Performance Max, you provide the assets — headlines, descriptions, images, videos, product feeds — and the objective, and Google decides where and to whom to show them.
There is one difference in practice: you lose sight of the cause. You can see the result, but not the entire journey that led to it. That’s why Performance Max is a powerful tool when the foundations are sound, but a risky one when they aren’t.
When does Performance Max work well?
- An online shop with a well-organised product feed. Titles, images, availability and prices that are updated automatically. The feed is the driving force behind this campaign.
- Accurate tracking of value-based conversions. If there is no order value, the campaign optimises for volume rather than profit.
- Enough data. With fewer than 30 conversions per month, the algorithm learns slowly and the results remain unstable.
- A wide range of products. The more items there are, the more combinations Google has to test.
When does Performance Max waste money?
Three situations I come across in almost every audit:
- It captures your brand-related searches. People who are already searching for you by name are coming in via Performance Max, and the campaign is taking credit for sales that you would have made even without it. The result looks excellent, but the actual contribution is minimal.
- It is working on a broken tracking system. If conversions are duplicated or their values are incorrect, the campaign will optimise in the wrong direction.
- It was launched alongside Search, using the same search queries. The two campaigns are competing for the same customer and driving up the price you pay to yourselves.
How can you stop brand traffic from eating you alive?
Add your brand terms as negative keywords in your Performance Max campaign and keep them in a separate Search campaign, where you pay a low cost per click and can see exactly what’s happening.
This is also the most common quick adjustment I make. The effect is visible within a week: the cost of acquiring a new customer rises because the low-cost branded conversions are excluded from the statistics — and this is precisely the accurate picture on which you can base your decision.
How can you measure whether Performance Max actually drives growth?
Based on the growth in new customers, not on the overall return on investment of the campaign. Google provides a target for acquiring new customers precisely because the overall metric includes people who are already your customers.
The practical rule: compare the business’s total revenue against the whole advertising spend for the period. This indicator is not affected by which campaign credited itself with the order. If the campaign’s return rises while total revenue stays flat, the campaign is redistributing rather than adding.
The order of the check is as follows. Take the revenue from the store’s administration, not from the ad account. Put next to it the entire spend across all channels for the same period. Compare two periods of equal length with no promotion and no holiday between them. Then add the new customers column at campaign level and split the conversions into new and returning. If the share of new ones does not move, the growth is on paper. The cleanest check remains pausing: you pause the campaign for an interval comparable to the stabilisation time of two to six weeks, and follow the revenue in the store, not the reported conversions in the account.
What should I check before running Performance Max?
Performance Max amplifies what is already in the account, including the mistakes. That is why not a single point is skipped.
- Whether the conversions report real orders and value, not events. I reconcile the number of orders in Google Ads with the number in the store’s administration; a difference of several times means a duplicated event or a counter that fires again when the page is reloaded.
- Whether Enhanced Conversions is implemented and working. It is checked by the status of the conversion action itself in the account, not by the presence of the code in GTM.
- Whether the product feed is complete and free of disapproved items. In Merchant Center I look at the disapproved products, the missing prices and stock, and the items whose price differs from the price on the page.
- Whether branded searches are excluded, through the brand exclusion list at campaign level, together with the common spelling variants and the Latin-alphabet forms.
- Whether there is a separate Search campaign for the most profitable queries to take over the branded traffic.
- What is the break-even point for your profit margin — ROAS threshold = 1 / margin. Below this threshold the revenue costs more than it brings in.
FAQ — Frequently asked questions about Performance Max
Can Performance Max replace Search campaigns?
This isn’t the case for most businesses. Search provides control and visibility over the specific queries that generate revenue. A sensible structure is to use Performance Max for reach, plus Search for the most profitable queries.
What sort of budget is required?
Enough to generate at least 30 conversions a month. If the figure is lower, the algorithm remains in learning mode and the results fluctuate.
Why is the campaign delivering an excellent return on investment, yet profits aren’t growing?
The most common reason is branded traffic. Check that your branded keywords are excluded and compare total revenue against total expenditure, rather than the campaign’s performance metrics alone.
Do I need a product feed?
For an online shop — yes, it’s the foundation. For services, Performance Max works even without a product feed, but there’s even less control there, and Search is usually more predictable.
How long does it take to stabilise?
Usually two to six weeks, depending on the volume of conversions. Changes to the budget or the target will restart the learning process, so don’t tinker with the campaign every day.
Conclusion
Performance Max is neither magic nor a trap. It’s an amplifier — it makes a good foundation stronger and a poor one more expensive.
If you’re already spending over €1,000 a month and aren’t sure whether the campaign is bringing in new customers or simply redistributing existing ones, start with an independent review.
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