Click-through-rate CTR

CTR is the number of clicks that your ad receives divided by the number of times your ad is shown (called impressions). The click-through rate of an advertisement is defined as the number of clicks on an ad divided by the number of times the ad is shown (impressions), expressed as a percentage. For example, if a banner ad is delivered 100 times (100 impressions) and receives five click, then the click-through rate for the advertisement would be 5%.