Google Ads has introduced A/B testing for Performance Max Asset Groups. Advertisers can now compare different sets of assets within the same asset group.
This new feature allows defining control and treatment groups, splitting traffic, and setting a success metric such as conversions or cost per conversion.

Google’s Experiment Guidance will help determine the duration needed for statistically significant results, recommending a runtime of at least 4 to 6 weeks.
This update was shared by Thomas Eccel.