What is Click-through rate?

Click-through rate (CTR) is the percentage of people who click on a link, ad, or call-to-action after seeing it—calculated as clicks divided by impressions, expressed as a percentage. CTR is a primary performance metric across digital advertising, email marketing, SEO, and social media. In paid social advertising, a higher CTR on an ad image indicates that the creative is successfully interrupting the scroll and compelling the viewer to learn more; for Facebook and Instagram ads, a strong CTR typically falls between 1–3% for cold audiences, with well-optimized AI UGC creative often achieving 2–5%. In organic search, CTR measures how often searchers click on a result after seeing it in a SERP—influenced heavily by title tags, meta descriptions, and rich snippets. For email campaigns, CTR measures how many recipients who opened the email clicked at least one link. CTR is often distinguished from conversion rate: CTR measures interest and intent, while conversion rate measures the percentage who complete the desired action (purchase, sign-up, etc.) after clicking. Improving CTR in paid social typically requires improving the creative—using authentic-looking content like AI UGC, person-forward compositions, and thumb-stopping hooks that signal relevance to the target audience within the first half-second of view.