Click-Through Rate, commonly abbreviated as CTR, is a metric used to measure the success of an online advertising campaign for a particular website as well as the effectiveness of email campaigns. Essentially, it is the ratio of users who click on a specific link to the number of total users who view a page, email, or advertisement. It is used to gauge how well your keywords, ads, and free listings are performing. CTR is calculated by dividing the number of clicks an ad receives by the number of times the ad is shown, expressed as a percentage. For instance, if an ad is displayed 1000 times and it receives 10 clicks, then the click-through rate for that ad would be 1%. A high CTR is indicative of an ad that is effective at capturing users’ attention and compelling them to take the action the ad is prompting, such as visiting a website or making a purchase. Conversely, a low CTR suggests that the ad is not resonating with the target audience or is not reaching the intended viewers. CTR is a crucial metric as it helps advertisers understand their audience’s response and allows them to optimize their marketing strategies for better engagement and conversion rates.