Click through rate
The click-through rate is a ratio that shows the percentage of people who click on your advertisement after being exposed to it. The CTR value can be used for analyzing the performance of your text or display ads, and for optimizing the content and graphic for improving click-through and conversion rates. CTR is calculated using the following formula:
CTR = clicks / impressions,
where "impressions" defines the number of times your ads are displayed and seen by users.