Click-Through Rate (CTR)
Click-through rate (CTR) is the percentage of people who click a link, button, or ad after seeing it.
What it means
CTR measures how compelling something is. If 100 people see your email subject line and 25 open it, your email open rate is 25%. If 100 people see your search result and 5 click it, your search CTR is 5%. The higher the rate, the better your headline, design, or offer is doing at grabbing attention.
CTR is most commonly used in email marketing, paid ads, and search engine results. Each context has very different normal ranges. A 2% CTR on a Google Ads campaign is decent. A 2% CTR on an email link is bad. Always benchmark against your specific channel.
A high CTR isn't always good. If your headline is clickbait, you'll get the click but lose the visitor on the next page. The metric to pair with CTR is conversion rate. Together they tell you whether you're attracting the right people.
Why it matters
CTR is your fastest signal for whether messaging works. Subject lines, ad copy, button labels, hero headlines: all of them affect CTR. Improving CTR usually costs nothing and compounds with everything else you do.
How to calculate click-through rate (ctr)
CTR = (Clicks / Impressions) × 100
Divide the number of clicks by the number of impressions (views), then multiply by 100.
Example with real numbers
Concrete example showing how this metric works in practice.
Scenario
You sent an email to 1,000 subscribers. 60 of them clicked the main CTA inside.
Calculation
(60 / 1,000) × 100 = 6%
What it means
Your email CTR is 6%, which is good. To improve it further, A/B test the CTA copy or move the button higher in the email.
What's a good number?
Typical benchmarks. Always compare against your own historical data first, industry averages second.
Below 1% (ads), below 2% (email)
1% to 2% (ads), 2% to 5% (email)
2% to 5% (ads), 5% to 10% (email)
Above 5% (ads), above 10% (email)
Search ad CTR varies wildly by keyword and position. Display ad CTR is much lower (often under 0.5%). These benchmarks are for response-style email campaigns and search ads.
Common mistakes
Things people get wrong when measuring click-through rate (ctr).
Mistake 01
Optimizing for CTR alone. A clickbait headline can lift CTR and tank conversion at the same time.
Mistake 02
Comparing CTR across channels (email vs search vs display). They're not comparable.
Mistake 03
Not segmenting CTR by audience or device. A great mobile CTR can hide a terrible desktop CTR.
Mistake 04
Treating CTR as a vanity metric. It's actionable when paired with conversion rate.
How to track it
For email and ads, your platform tracks CTR automatically. For your own buttons and CTAs, set up event tracking in your analytics tool. Muro tracks button and link clicks automatically once installed.
Related concepts
Other terms worth learning if you're studying this one.
Common questions about click-through rate (ctr)
It depends on the channel. For Google search ads, 2% to 5% is good. For email, 2% to 5% is average and 5%+ is good. For display ads, anything above 0.5% is solid. Compare against your own historical CTR more than industry benchmarks.
Test your headline or subject line first (biggest impact). Then test button copy, button color, button placement, and the surrounding context. Small changes often produce big CTR shifts.
CTR measures clicks on something. Conversion rate measures the percentage who completed a goal afterward. CTR is the first step, conversion rate is the destination.