Click-Through Rate
Aussi : CTR, Clickthrough Rate, Click Rate
Click-Through Rate (CTR) is the percentage of people who click a link, ad, or call to action out of those who viewed it.
What It Is
Click-Through Rate (CTR) measures how often people who see a link, ad, email, or search result actually click on it. It is expressed as a percentage and calculated with a simple formula:
CTR = (Clicks / Impressions) x 100
For example, if an ad is shown 10,000 times and gets 250 clicks, the CTR is 2.5%.
An impression is a single view or display of the element, while a click is a recorded interaction. CTR can be applied across many channels: paid search ads, display banners, email campaigns, organic search listings, social posts, and on-page buttons.
Why it matters
CTR is a core indicator of relevance and message strength. A high CTR usually signals that the creative, targeting, and offer resonate with the audience. A low CTR may point to weak copy, poor targeting, the wrong placement, or audience fatigue.
It also has direct financial impact:
- In paid search, platforms often reward high CTR with better Quality Scores, which can lower cost per click.
- In email, CTR shows how well subject lines and content drive action, not just opens.
- In SEO, CTR from search results can influence visibility and traffic without extra spend.
How it is used in practice
- Benchmarking: Compare CTR against past campaigns, channels, or industry norms.
- A/B testing: Test headlines, images, or buttons and pick the version with the higher CTR.
- Diagnosing the funnel: A high CTR with low conversions suggests a landing page or offer problem, not an ad problem.
- Budget decisions: Shift spend toward placements and audiences with strong CTR.
Important caveat: CTR measures interest, not value. A clickbait headline can lift CTR while hurting conversions and trust. Always read CTR alongside conversion rate, cost per acquisition, and revenue.
Concrete Example
A CMO runs two email subject lines to 50,000 subscribers each. Variant A earns 1,500 clicks (3.0% CTR) and Variant B earns 1,000 clicks (2.0% CTR). Variant A wins on engagement, so it becomes the default. The team then checks downstream conversions to confirm the extra clicks turn into sales, not just curiosity.