When Google evaluates advertising quality, it mainly looks at three major aspects: ad relevance, expected click-through rate (CTR), and landing page experience.

· Advertising relevance: Advertising content must match user searches. Google will compare the advertising information with the search keywords, and the more relevant the information, the higher the score.
· Expected click-through rate (CTR): predicts future click-through rate based on past ad performance. Google will consider search terms, devices and other factors to give more accurate predictions.
· Landing page experience: Evaluate the relevance of the landing page to the advertisement and the user experience. Including page content, navigation, loading speed, etc. to ensure smooth user access.