Google is expanding its Search campaign experiments with new ways to test budgets and ROI targets across multiple campaigns in a single A/B test.
Building on the one click experiments introduced for AI Max in August 2025, the new capability called “Budget or bidding target experiments for Search Campaigns” will roll out in September. Advertisers will be able to test how scaling budgets or changing ROI targets impacts performance across several Search campaigns at once.
Visit the official announcement here: Make AI Max work for your business with new testing and planning tools.