Two Google Ads campaign concepts labeled A and B, with a highlighted change for comparison.
Google Ads & PPC

Google Ads Experiments: How to A/B Test Campaigns, Bids and Performance Max

Google Ads experiments let you A/B test bid strategies, keywords, landing pages, assets and campaign types before rolling them out. This guide covers every experiment type, cookie vs search splits, sync, how long to run, how to read the 80% range and 95% asterisk, Performance Max experiments, lift studies and the 2026 changes.