Click-through rate (CTR) is a vital metric in digital marketing for assessing the performance of online advertising campaigns. It measures the percentage of people who click on an ad after seeing it. A higher CTR indicates that the ad is relevant, engaging, and effectively captures the audience’s attention. It is calculated by dividing the number of clicks on an ad by the total number of impressions. For example, if an ad receives 100 clicks out of 1,000 impressions, the CTR would be 10%. A high CTR suggests that the ad’s messaging and visuals resonate with the target audience, making it more likely to drive conversions and achieve campaign goals.