CTR: what it is, how to calculate it and when it misleads
CTR (click-through rate) is the percentage of impressions that turned into a click. It measures whether the ad catches the attention of the people who see it.
Formula
CTR = Clicks ÷ Impressions × 100
In Meta Ads, prefer the link click-through rate, which only counts people who went to your site.
Worked example
- Impressions: 30,000
- Link clicks: 450
450 ÷ 30,000 × 100 = 1.5%
If the other ads in the same ad set run at 2.4%, this creative is pulling less with the same audience and the same auction.
What the agents do with your CTR
Ad "Testimonial video 2" dropped from 2.6% to 1.1% CTR in 10 days, with frequency at 4.2.
Suggestion: swap the creative. The other ads in the ad set are still above 2%, so the problem is fatigue, not the audience.
How to read CTR
Compare ads in the same ad set
Same audience, same auction: the CTR gap comes almost entirely from the creative and the message.
Falling CTR with rising frequency means fatigue
When the same people see the ad again and click less, the creative is worn out. Time to swap it.
Search and social do not compare
On search, people are already looking for what you sell, so CTR is naturally higher. Compare each channel with itself.
When the number misleads
A click is not a sale
A flashy promise gets clicks from people who will not buy. High CTR with a low conversion rate on the site means the ad and the page do not match.
CTR (all) inflates the number
In Meta Ads, "CTR (all)" counts likes, profile clicks and "see more". To decide, use the link click-through rate.
Brand terms pull the average up
In Google Ads, people searching for your name click a lot. Mixing brand with everything else makes the account CTR look good and hides bad terms.
Where CTR shows up
Ask Sherlok
Which creative has the best CTR in the last 30 days?
Which ads are losing CTR?
Is my high CTR turning into sales?
Which search term gets clicks but does not convert?
Questions about CTR
What is a good CTR?
One above the other ads in the same account, on the same channel and placement. Industry averages vary too much across sectors to be a useful yardstick.
Is a high CTR always good?
No. If the click does not convert, a high CTR only raises spend. Read CTR together with the landing page conversion rate.
Why did my CTR drop?
The usual causes are a tired creative (rising frequency), a saturated audience or a placement change. Compare with the other ads in the ad set to tell creative from audience.
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