Clickthrough Rate (CTR) in SEO is the percentage of users who click on a specific link out of the total users who view a search engine results page (SERP) or an online advertisement. It measures how effective a webpage or ad is at attracting clicks from searchers.
Synonyms: Click-Through Rate, CTR, Click Rate, Click Percentage

CTR is a key metric in SEO because it directly reflects how well your webpage title and meta description attract users' attention in search results. A higher CTR means more traffic to your site, which can improve your search rankings and increase conversions.
SEO professionals analyze CTR to understand user behavior and optimize page titles, meta descriptions, and snippets to make them more appealing. Improving CTR can lead to better organic traffic without increasing ad spend.
If your webpage appears 1,000 times in search results and 50 users click on it, your CTR is 5%. Similarly, if an ad is shown 500 times and receives 25 clicks, the CTR is 5%. Monitoring these numbers helps in refining SEO strategies.