The percentage of users who click on a link or call-to-action after viewing it. CTR is calculated by dividing clicks by impressions and multiplying by 100.
The percentage of users who complete a desired action (purchase, sign-up, download) out of the total visitors. It measures the effectiveness of marketing efforts.
The total number of times content is displayed to users, regardless of whether it was clicked. One user can generate multiple impressions if they see the same content multiple times.