Google Ads Quality Score is a rating system focusing on the quality and relevancy of keywords and ads. It is measured on a scale from 1-10 and is applied to each keyword in your campaigns. In general, it is a useful tool that provides insights into how relevant your landing page and ads are to the keywords in your account. The quality score is determined by 3 factors, which are:    Ad relevance which measures how well ad copy matches the specific keywords in the ad group.    Expected CTR which measures how likely it is that someone who has been expose to an ad will actually click on it.    Landing page experience which measures how relevant and useful a website’s landing page is to people who will click on an ad.