CTR (Click-Through Rate) is the share of clicks relative to those who saw the ad. Formula: CTR = clicks ÷ impressions × 100%. For example, 200 clicks from 10,000 impressions is a CTR of 2%.
CTR is the first signal of how appealing the ad creative and offer are. A low CTR often points to a weak headline, wrong audience, or unclear offer. But a high CTR alone doesn't guarantee sales — the click then has to convert.
