Google is expanding experimentation capabilities in Performance Max, giving advertisers more ways to test creative assets and measure campaign performance before making large-scale changes.

What’s happening. Google is rolling out new asset experiments for Performance Max campaigns, allowing advertisers to test how different creative assets affect results.

The feature enables marketers to compare entirely new asset groups, evaluate the impact of adding individual assets, or measure the performance of seasonal creative against evergreen content.

Advertisers will also be able to test assets generated through Google’s Asset Studio.

The big picture. Performance Max has long automated campaign optimization across Google’s inventory, but advertisers have had limited visibility into the impact of creative changes.

The new experiments aim to give marketers a more controlled way to evaluate creative decisions before applying them across campaigns.

Between the lines. The addition of a second success metric could be particularly valuable for advertisers balancing competing objectives, such as maximizing conversions while maintaining efficiency targets.

Rather than declaring a winner based on a single KPI, marketers will be able to evaluate how changes affect broader campaign performance.

What else is new:

  • Conversion lift studies and experiments are being brought together under one Experiments page.
  • Additional experiment and measurement capabilities are planned for future releases.
  • Expanded support for manager accounts (MCCs) and the Google Ads API is expected to begin rolling out in the coming weeks.

Why we care. Creative remains one of the biggest levers available to Performance Max advertisers, yet testing new assets often involves risk. The new experimentation tools provide a structured way to validate creative decisions with data before fully committing budget.

What to watch. As Google continues investing in automation and AI-generated creative, asset testing is becoming increasingly important. The ability to directly compare human-created, seasonal, evergreen, and AI-generated assets could offer advertisers deeper insight into what drives performance across Performance Max campaigns.

The bottom line. Google is giving Performance Max advertisers more sophisticated testing capabilities, making it easier to evaluate creative changes, measure results across multiple KPIs, and manage experiments from a centralized location.

First spotted. The update was first spotted by PPC News Feed.


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Anu Adegbola

Anu Adegbola has been Paid Media Editor of Search Engine…

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Last Update: June 8, 2026