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How does changing my URL affect my Quality Score in Google Ads?

Whenever you make changes to an ad in Google Ads in any way, be it landing page or ad copy, the history of the ad resets and the quality score calculation starts over.

However, after the ad is built again with a Branch link, deep linking improves the conversion rate, so the ad quality score should improve once you start using a Branch link.

The best practice of making changes to an ad is to always create a new ad unit.