The average click-through rate (CTR) is a measure of the effectiveness of an online advertisement, calculated by dividing the number of clicks on the ad by the number of times it was shown. It is a crucial metric for digital marketers, as it indicates the percentage of viewers who were compelled to click on the ad and visit the advertiser’s website. A high CTR is indicative of a successful ad campaign, while a low CTR may suggest that the ad is not resonating with the target audience. CTR is often used to track the performance of different ad formats and placements, allowing advertisers to optimize their strategies and maximize their return on investment.