Ad A/B Testing in 2026: How to Test RSAs When Google Assembles the Ad Itself
Search A/B testing used to be simple: two ads in rotation, the higher CTR survives. RSA broke that mechanic: Google assembles the ad from your headlines and descriptions, the combinations run into the thousands, and “ad A vs ad B” no longer exists. But ad A/B testing didn’t die — it moved up a level:…