CTR (Click-Through Rate)

Click-Through Rate is clicks ÷ impressions, expressed as a percentage. It measures how compelling a creative, headline or placement is at earning the click — the first step before conversion can happen.

CTR expresses how many clicks an ad, link, or listing earns relative to how many times it was shown, calculated as clicks divided by impressions times 100. It measures the pulling power of the creative and its placement, not whether the resulting visit converts. Because impressions are the denominator, the same link can post very different CTRs across ad slots, email subject lines, or SERP positions.

CTR guides upstream optimisation: it tells you whether headlines, images, and calls to action are compelling enough to earn attention. A weak CTR caps the volume feeding every later stage, so lifting it multiplies the traffic your downstream conversion rate can act on. It is also a ranking input for platforms like search and email, where higher engagement can lower costs or improve deliverability.

Benchmarks vary sharply by channel: display banners often sit well under 1 percent, paid search commonly lands between 2 and 5 percent, and a well-targeted email can exceed 10 percent. Compare CTR within the same channel and audience, never across them. Position and audience temperature explain most of the spread.

A high CTR is not automatically good, because clickbait creative can pull clicks that never convert and inflate ad costs. Impressions are also measured inconsistently — a viewable impression differs from a served one — so two platforms can report incompatible CTRs. Pair CTR with conversion rate to confirm the clicks are the right ones.