In practice
CTR is a diagnostic, not a goal. A low rate on a well-ranked page usually points at a title and description problem; a high rate with poor conversion points at a promise the page does not keep.
Compare like with like: CTR varies enormously by position, device and query intent, so benchmark against your own history rather than industry averages.
Why it matters
It is the cheapest lever in search. Rewriting titles on pages that already rank can move traffic within days, with no new content and no new spend.
Related terms