Click-Through Rate
Also known as: CTR
Click-through rate (CTR) is the percentage of people who clicked your ad after seeing it, calculated as clicks divided by impressions. In paid search it signals how compelling and relevant your ad copy is to the searcher and feeds directly into the expected CTR component of Quality Score.
Key Takeaways
- Click-through rate is the percentage of people who clicked an ad or link after seeing it.
- It is calculated as clicks divided by impressions, then multiplied by 100.
- In paid search, CTR signals how relevant and compelling an ad is to the searcher's query.
- CTR feeds the expected click-through rate component of Quality Score, which influences Ad Rank and costs.
- Optimizing CTR alone can backfire, since clickbait can attract unqualified clicks that never convert.
How It Works
Click-through rate divides the number of clicks by the number of impressions. If an ad is shown one thousand times and clicked twenty times, its CTR is two percent. It is an early read on whether the message and targeting resonate with the audience seeing it.
In Google Ads, CTR carries extra weight because expected CTR is a core input to Quality Score. A higher Quality Score improves Ad Rank, which can win better ad positions at a lower cost per click, so relevant copy that earns clicks tends to pay off twice.
CTR should never be judged in isolation. A tempting but misleading headline can lift CTR while drawing visitors who never buy, which quietly raises Cost Per Acquisition. The goal is a high CTR from the right people, so you weigh clicks against downstream conversions rather than chasing clicks for their own sake.
Why It Matters
CTR is an early indicator of ad relevance and messaging fit. A strong CTR lifts Quality Score and Ad Rank, which lowers costs, while a weak CTR flags copy or targeting that is missing the searcher's intent.
Example
A SaaS site tests two search ads. The first promises a vague Best Software Deal and pulls a high CTR, but few visitors sign up. The second names the actual product and its core benefit, earning a slightly lower CTR but far more trials. The team keeps the second ad, since it attracts qualified clicks and lowers cost per acquisition.
Common Mistake
Optimizing for CTR in isolation. A clickbait headline can spike CTR while attracting unqualified clicks that never convert, raising spend and hurting cost per acquisition.
Frequently Asked Questions
How is click-through rate calculated?
Divide the number of clicks by the number of impressions, then multiply by 100 to get a percentage. For example, 50 clicks from 5,000 impressions is a 1 percent CTR. Impressions count each time the ad or link was shown.
What is a good CTR?
It varies widely by channel, industry, ad position, and query intent, so there is no single benchmark. Branded search ads often see high CTRs, while broad display ads see much lower ones. Compare against your own past performance and close competitors.
Why does CTR affect my ad costs?
In Google Ads, expected CTR feeds Quality Score, and a higher Quality Score improves Ad Rank. Better Ad Rank can secure stronger positions at a lower cost per click, so relevant ads that earn clicks often cost less.
Can a high CTR be bad?
Yes. A misleading or overly broad headline can spike CTR while attracting unqualified clicks that never convert. That raises spend and hurts cost per acquisition. Always weigh CTR against conversions rather than optimizing for clicks alone.