Google is updating Performance Planner with new tools to help advertisers evaluate campaign changes before applying them.
Advertisers can now examine how adjustments to bidding or budget targets may affect the performance of their existing campaigns. If the suggested changes align with their goals, they can apply them directly with a single click.

This update gives advertisers another way to assess potential performance outcomes and turn planning recommendations into campaign changes more quickly.
Check the official announcement: Make AI Max work for your business with new testing and planning tools.