How CTR is calculated
Click-through rate is clicks divided by impressions, expressed as a percentage. Every platform that reports both numbers reports the ratio, and every platform calculates it for the row you are looking at — a query, a page, a keyword, an ad, a country.
That last point causes most of the confusion. A site-wide CTR is the weighted result of every row underneath it, so it is dominated by whichever queries produced the most impressions. Brand searches, where people are already looking for you by name, click far more readily than broad informational searches; a site that starts ranking for many general queries will watch its overall CTR fall while nothing has actually got worse.
Ad platforms add their own variants. Meta reports a rate for clicks on the whole ad and a separate one for link clicks, and those two answer different questions.
Why CTR matters
In organic search it is the one lever that works without moving position. The same ranking, the same audience, a clearer title and a description that matches what the searcher wanted — and more of the people already seeing you choose you instead of the listing above or below.
In Google Ads it also affects cost. Expected click-through rate is one of the components behind Quality Score, which feeds Ad Rank, so ads that earn clicks tend to hold their position more cheaply than ads that do not. That makes CTR a cost lever as well as a traffic one.
Common mistakes with CTR
The first is comparing rates across different positions. A listing near the top of the page and one near the bottom face completely different odds, so CTR only means something when the rows compared sit at a similar average position.
The second is chasing it with promises the page does not keep. A title that overstates what is behind it wins the click and loses the visit, and in paid campaigns you have paid for that departure.
The third is judging a page’s CTR without looking at the result page it appears on. Where the answer is already displayed in a snippet, a map pack or an AI summary, fewer people click any result at all — that is the search page changing, not your listing failing.
The fourth is comparing organic and paid rates as though they were the same measurement. They are not, and neither is a target for the other.
How to act on it
Work through Search Console one page at a time. Filter to the page, list the queries it earns impressions for, and find the rows with many impressions and few clicks at a decent position — those are the pages where a rewrite pays back immediately.
Then rewrite the title and description to name what the reader gets, and check the length before publishing so neither is truncated in results; the meta title and description checker will show how it is likely to appear. Give the change several weeks, compare the same queries at the same position, and keep it only if the clicks moved.