The number of times your ad is displayed to users.
The number of times your ad is clicked by users.
The percentage of people who click on your ad after seeing it. It's calculated by dividing clicks by impressions.

A specific action taken by a user on your website (e.g., completing a purchase or signing up for a newsletter).

A rating Google gives your ads based on the relevance of your keywords, ad copy, and landing page. Higher Quality Scores can reduce your costs and improve your ad positions.
The revenue generated by your ad campaigns compared to the cost spent on ads.
The percentage of impressions your ads have received compared to the total number of impressions they were eligible for.
Interactions like clicks, video views, or downloads that show how engaged users are with your ad content.