Accelerated Mobile Pages (AMP) are pages that load near instantaneously for mobile users. To date, you could test the impact of your AMP pages vs. conventional web pages using either Google Ads' campaign experiments or ad variations. You can learn more about the pros and cons of each approach for testing AMP pages here. To make your AMP testing even more insightful, we've developed a new testing methodology for campaign experiments known as "cookie-based splits." This new testing type aligns with ad variations’ cookie-based approach. We recommend you use this methodology whenever you test AMP pages via campaign experiments. By default, campaign experiments assigns users to a test or control group every time they enter a search (also known as "search-based splits"). This means any given user may see both the test and control experiences over the course of a day. In contrast, the new "cookie-based splits" assigns users to the test or control group. As a result, any given user will either always see your AMP page (if they are in the test group) or always see your non-AMP page (if they are in the control group). We hope this helps you better test the efficacy of driving your search ads traffic to AMP pages. Posted by Prashant Nair, Product Manager, Google Ads