Google has introduced new features for AI Max, enhancing testing and planning tools to improve Search campaign performance. Starting in September 2026, users can conduct multi-campaign A/B tests, allowing them to evaluate different budgets and ROI targets in one test.

New capabilities in AI Max experiments also enable advertisers to maintain specific brand and location controls while conducting tests.
Additionally, Performance Planner has been updated to allow users to view how changes in bidding or budget targets may affect overall campaign performance and apply suggested changes in a single click.
Here’s the official announcement: New AI Max tools can help you scale Search campaigns.