Performance Max (PMax) campaigns in Google Ads

Performance Max (PMax) is a Google Ads campaign type that brings all Google advertising channels together in one place: Search, the Display Network, YouTube, Gmail, Discover and Maps. Instead of building separate campaigns for each channel, you provide a set of assets — headlines, descriptions, images, video, a logo — and Google AI autonomously selects placements, bids and creative combinations, aiming for the highest possible number of conversions or conversion value within the given budget.

Our experience running Performance Max campaigns shows that PMax success depends largely on the quality of the inputs: the richness of the assets, the precision of the audience signals and the correctness of the conversion tracking setup. The campaign is only as good as the data you feed it — which is why asset configuration and optimization is one of the specialist's key roles.

Assets — the foundation of a PMax campaign

Assets are the creative elements supplied to the campaign: headlines (up to 15), descriptions (up to 4), images, a logo and video. Google AI combines them into ads matched to the context and channel — one version on YouTube, another in Search, another in Maps. The richer and higher quality the asset set, the more combinations the algorithm can test. The Google Ads panel shows a performance rating for each asset (Best / Good / Low) — and we optimize the creative on an ongoing basis accordingly.

• Headlines and descriptions — up to 15 headlines and 4 descriptions, combined by AI into well-matched text ads.
• Images — a minimum of 1 landscape and 1 square image; we recommend providing several variants of each format.
• Video — at least one YouTube video (minimum 10 s); without your own video, Google AI auto-generates one from images, which lowers effectiveness.
• Logo — required for ads to display correctly on the Display Network and YouTube.
• Extensions (sitelinks, callouts, snippets) — they expand the ad's footprint and lift CTR in Search.

Audience signals — accelerating Google AI's learning

Audience signals are hints passed to the algorithm that help it find valuable users faster. As signals we can use remarketing lists, your own customer lists (Customer Match), visitors to selected pages, and custom audiences based on interests and intent. Google AI treats signals as a starting point — it does not restrict itself to them, but uses them to speed up the learning phase. A campaign without signals runs slower and more expensively at the start.

PMax vs. Search and Shopping campaigns

Search and PMax campaigns run in parallel — Search takes precedence for exact-match keywords, so a correct account structure eliminates budget cannibalization. The Shopping campaign is replaced by PMax with a Merchant Center product feed — PMax combines product ads with the Display Network and YouTube, optimizing ROAS across all channels simultaneously. In online stores, PMax with an e-commerce feed is the standard tool for scaling sales. It is also worth considering integration with a CSS comparison service, which can lower your effective cost per click in Google Shopping results.

Transparency and control in PMax campaigns

Performance Max gives the algorithm wide latitude, which is sometimes perceived as a lack of transparency. In practice, however, the specialist has several control tools: keyword exclusions (at the account level), URL exclusions, placement exclusion lists, and detailed insight into asset and asset group performance. Regular analysis of this data and active work with assets are the keys to keeping the campaign profitable.