Analytics & Measurement
Click-through rate
Also known as: CTR, clickthrough rate
Click-through rate is the proportion of people who saw something and then clicked it, expressed as clicks divided by impressions. It is used to judge search listings, ads, emails and internal links. A higher rate usually means the message matched what the audience was looking for.
What it is
Click-through rate, or CTR, is a ratio rather than a volume measure. In search it compares clicks on a listing to the number of times that listing was shown; in email it compares clicks to delivered messages or opens, depending on the definition used. Because the denominator differs by platform, the same label can describe slightly different things.
Why it matters
CTR tells you whether your title, description, creative or subject line earned attention from the people who already saw it, which separates presentation problems from visibility problems. In search it also helps diagnose the gap between ranking and traffic, particularly where AI summaries, featured snippets and other result features absorb clicks. Tracking it by query, page and device shows where a rewrite is likely to pay off.
How it works
Practitioners pull clicks and impressions from tools such as Search Console or their ad and email platforms, then segment by query type, page, position, device and country before comparing. Because rate falls sharply with position, comparisons are only meaningful within similar positions or result layouts. Typical actions include rewriting titles and meta descriptions, adding structured data, testing ad creative and tightening subject lines, then measuring the change against a stable baseline.
When it applies
Use it whenever an item is shown to an audience and a click is the next step, including organic listings, paid ads, email campaigns and on page modules. It is less useful in isolation for queries answered directly in the results, where a low rate may reflect the layout rather than weak copy.
Examples
- A guide ranks fourth for a commercial query but has a low CTR, so the team rewrites the title to include the year and the specific use case.
- An ecommerce brand tests two ad headlines and keeps the one with the higher CTR at similar cost per click.
- A newsletter compares CTR across two subject lines sent to matched segments to see which prompt drives more clicks to the article.
How it is measured
- Clicks divided by impressions overall, then split by query, page, device and country
- CTR by average position, to compare like with like
- CTR change before and after a title, description or creative rewrite
- CTR alongside conversion rate, so higher clicks are not mistaken for better outcomes
Related terms in Analytics & Measurement
- A/B testingA/B testing is a controlled experiment that shows two or more versions of a page, email or feature to randomly split groups of users and compares how each performs against a chosen goal. It isolates the effect of a single change so improvement can be attributed rather than assumed. It is also called split testing.
- AttributionAttribution is the practice of assigning credit for a conversion to the marketing touchpoints that preceded it. It covers the models, rules and data joins used to decide which channels, campaigns or content get counted. In AI search, attribution is harder because many assistant-led journeys leave little or no referral data.
- Consent ModeConsent Mode is a Google framework that lets tags adjust their behaviour based on the consent choices a visitor has made. Instead of tags being blocked outright, they receive signals about whether analytics and advertising storage are allowed, and act accordingly. Version 2 added parameters covering the use of personal data for ads and for ad personalisation.
- Conversion trackingConversion tracking is the practice of recording the actions you care about, such as purchases, form submissions or calls, and connecting them back to the channel, campaign or session that led to them. It gives advertising platforms and analytics tools the outcome data they need to report performance and optimise bidding. Accuracy depends on correct tag implementation, consent handling and clear conversion definitions.
- Cross-channel reportingCross-channel reporting is the practice of bringing performance data from search, social, email, paid media, AI assistants and other channels into a single view. It standardises metrics and time periods so channels can be compared fairly rather than judged in isolated platform dashboards. The aim is to show how channels work together to produce enquiries, sales and revenue.
- Customer lifetime valueCustomer lifetime value (CLV or LTV) is the total profit or revenue a business expects to earn from a customer relationship over its lifetime. It combines purchase value, purchase frequency, margin, and retention into a single forward looking figure. Teams use it to decide how much they can afford to spend acquiring and keeping customers.
Primary research · August 2026
How ChatGPT Shortlists Software Brands
An audit across 10 categories and 60 buying questions. I recorded what ChatGPT reads, throws away and links to when a buyer asks it which software to buy, and what that decides.
- 60
- Questions asked
- 10
- Software markets
- 2,680
- Results read
- 367
- Links shown
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