Click-Through Rate (CTR) is a metric that determines the ratio of clicks to impressions on an advertisement or a link. It is often used in online advertising and email marketing to evaluate the effectiveness of campaigns.
A high CTR typically indicates an effective message or an attractive offer, while a low CTR prompts a review and optimization of ad copy, design, or landing pages. Additionally, CTR can also impact the position of ads in paid search results or the ranking of a website in organic search results.