Paid Advertising
Click-Through Rate (CTR)
The percentage of people who click your ad after seeing it, calculated by dividing clicks by impressions.
Definition
Click-Through Rate is the share of ad impressions that result in a click, expressed as a percentage. It's a direct measure of how relevant and compelling your ad is to the people who see it, and it feeds into Quality Score on Google Ads.
In depth
CTR answers a simple question: of everyone who saw the ad, how many cared enough to click? A higher CTR usually means your headline, offer, and targeting are lined up with what searchers actually want. On search, CTR varies a lot by ad position and keyword intent, so it's most useful when you compare like-for-like.
CTR matters for your budget because Google rewards it. Ads that earn clicks get a Quality Score boost, which lowers your cost per click and can lift your ad rank without raising your bid. In practice, improving CTR is one of the cheapest ways to make a paid search account more efficient.
The mistake is chasing CTR for its own sake. A clickbait headline can spike CTR while attracting people who never convert, which raises your real costs downstream. We aim for a high CTR among the right audience, then judge the result by leads and acquisitions, not clicks alone.
The formula
CTR = (Clicks ÷ Impressions) × 100 Worked example
A remodeler's ad shown 5,000 times that gets 150 clicks has a 3% CTR. Tighten the headline to match a search like 'kitchen remodeler near me' and you might push it to 4.5%, which can also lower your CPC.
Paid Advertising
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