In one line
Conversions ÷ clicks. CVR (Conversion Rate) is the share of clicks or visits that turned into a desired action.
Why it matters
If CTR measures whether the ad was compelling enough to click, CVR measures what happened after — whether the person actually acted. A low CVR is rarely an ad problem; it's usually a landing page, offer, or audience-fit problem.
What to watch out for
Chasing CVR alone can shrink your volume drastically. Think in terms of CVR × volume = total conversions, not the rate in isolation.
Run the numbers
60 conversions on 2,000 clicks is a 3% CVR. Count the same 60 against 1,200 landing visits and you get 5%. Both are correct, and the gap between them is itself information: 40% of the clicks never reached the landing page.
The same arithmetic explains why rate and volume have to be read together. Narrow the audience until clicks fall to 800 and CVR rises to 5%, and conversions are 40 — down by 20 even though the rate improved. CVR × volume = conversions is the relationship that gets lost when only the rate is watched.
Diagnosing a drop, in order
Start by pinning down whether the denominator is clicks, landing visits, or signup starts. If click-based CVR fell while visit-based CVR held, suspect landing page load time or click quality. If visit-based CVR fell too, look at the offer, pricing, signup steps, and payment errors — the product experience rather than the ad.
Splitting by ad message and landing page combination usually beats looking at a channel average. Check whether one creative is driving high CTR but low-intent traffic, or whether the drop is confined to a single country or OS.
Go deeper
What to check when CVR won't budge is covered in the conversion funnel guide.