Clickthrough Ratio (CTR) in SEO is the percentage of users who click on a specific link or search result out of the total users who viewed that link or result. It measures how effective a webpage or ad is at attracting clicks from search engine results pages (SERPs).
Synonyms: CTR, Clickthrough Rate, Click Rate, Click Percentage

Clickthrough Ratio is a key metric in SEO because it directly reflects how well your webpage title, meta description, and overall listing attract users' attention in search results. A higher CTR means more traffic to your site, which can lead to better rankings and increased conversions.
Marketers and SEO professionals use CTR to evaluate the performance of their search listings and ads. By analyzing CTR, they can optimize titles, descriptions, and keywords to improve visibility and encourage more clicks.
If your webpage appears 1,000 times in search results and 100 users click on it, your CTR is 10%. Improving your CTR from 10% to 15% means more visitors without increasing your search impressions.