CTR, or Click Through Rate, refers to the metric that evaluates the performance of ads or links by comparing the number of clicks received with the total number of impressions (times the ad or link is displayed). A high CTR suggests that the content is relevant and captures the attention of the target audience. It is essential to measure the effectiveness of digital advertising campaigns and the relevance of the content presented.

CTR is a key KPI in digital marketing as it provides valuable information about the effectiveness of advertising strategies and the level of audience interaction with ads.