Metrik.world
CTR (advertising)
CTR expresses what percentage of all ad impressions led to a click – for example, to a website, e-shop or another target destination. It shows how attractive and relevant the ad was to users, i.e. how often people not only saw it but acted on it.
alternative names
- click-through rate
- clickthrough rate
- CTR
related metrics
units
- % (ratio)
Additions, clarifications, extended definition
CTR is calculated as the ratio of clicks to impressions. It is usually expressed as a percentage.
We distinguish between CTR All Clicks – all types of clicks (e.g. on the profile, image, website, etc.) – and CTR (to website) – only clicks that led directly to the target web page.
In an advertising context, CTR is used as an indicator of creative quality and message relevance.
Interpretation
A high click-through rate suggests the ad captured attention and matched the target group's expectations, while a low one may signal a problem with content, format or targeting.
A low CTR may point to insufficiently compelling content, poor placement or overly broad targeting.
For example, CTR = 1% means that for every 100 ad impressions, 1 user clicked on it.
Watch out: limits and risks of distortion
- Average CTR values vary considerably by format and channel. For example, video or carousel formats tend to have a different CTR than static banners.
- High CTR ≠ campaign success. If visitors take no action after arriving on the site (e.g. purchase or registration), a high CTR is worthless.
- Too low a CTR can hurt the "relevance score" or "ad rank" and increase the cost per click (CPC).
Where and how to measure
- Via ad platforms, e.g. Google Ads, Meta Ads Manager, LinkedIn Campaign Manager, Adform, etc. In all cases it is calculated automatically from the ratio of impressions to clicks.
- For CTR (to website), only clicks leading to an external page are tracked – typically the company website, landing page or e-shop – readable e.g. in Google Analytics.
Formulas
CTR (%) = (number of clicks / number of impressions) × 100
website CTR = (number of clicks to the website / number of impressions) × 100
Example from practice
A financial institution launched a month-long online campaign to drive users to a new microsite for household insurance. The campaign ran on the Google Display Network and Facebook.
In total it generated 1.8 million impressions and 9,000 clicks, corresponding to a CTR of 0.5%. Of these, 6,800 clicks led directly to the campaign landing page – i.e. a CTR (to website) of 0.38%. Subsequent analysis revealed that video ads had a CTR of 0.9%, while static banners only 0.3%. After optimising the creative and placements, the overall CTR rose to 0.7%, and the number of quality site visits (pages viewed > 30 s) increased by 40%.
