What is CTR (click-through rate)?
CTR is the share of people who saw an ad and clicked it: clicks divided by impressions.
Formula
CTR = clicks ÷ impressions × 100%CTR shows whether the creative and the offer earn attention from the audience you're paying to reach.
A CTR that falls over time while frequency climbs is the classic sign of creative fatigue.
Example
1,200 clicks from 80,000 impressions is a CTR of 1.5%.