click-through rate (CTR)

basicwidespread

The click-through rate shows what percentage of impressions of an advertisement, link, or search result resulted in an actual click.

In plain terms

Imagine that a thousand people walk past a shop window daily, and thirty of them enter. The shop window's "click-through rate" is then 3 percent. The same happens online: the display is walking past the window, and the click is entering.

The metric is useful to determine how eye-catching a headline, advertisement, newsletter, or search result is. If many people see it but hardly anyone clicks, something is wrong: the wording is poor, it appears in the wrong place, or it is not aimed at those who see it.

Important: CTR measures only interest, not results. It shows how many entered the door, but not whether they bought, were satisfied, or left disappointed after ten seconds.

In the AI era, the role of the link is changing. If the search engine's AI summary already answers the question on the results page, or a chatbot answers directly, people often do not click through, even though the machine used the content for the answer.

How it works

The system counts impressions: how many times an ad, link, or result appeared on someone's screen.
It also counts clicks: how many times someone actually clicked.
It divides the number of clicks by the number of impressions and multiplies by one hundred. 2,000 impressions and 50 clicks result in a 2.5 percent click-through rate.
Results must be contextualized: what counts as good differs significantly at the top of search results, in a newsletter, or in a banner ad, so only similar things should be compared with similar things.
Advertising and recommendation systems also use the metric: machine learning estimates what you are most likely to click on and places that in front of you.

An everyday example

You search Google for "best robot vacuum cleaner" and click on the result whose title promises the most. Your click improves the click-through rate of that page and reduces that of the other nine, as they appeared but were not chosen.

Who is affected

marketerThis is one of the key metrics used to measure and compare the performance of ads, newsletters, and search results daily. → Marketing

entrepreneur, executiveThe click-through rate affects the cost of acquiring a visitor: in search advertising, an ad with a better rate typically gets clicks more cheaply, meaning the money spent on advertising pays off better.

everyoneWhat you see in your news feed, search engine, or video recommendations is partly determined by what many people clicked on previously.

A common misconception

MythThe higher the click-through rate, the more successful the advertisement or content.

In realityA high CTR only indicates that many people clicked; it does not mean they received what they expected. A misleading, clickbait headline can yield excellent ratios while no one buys anything and visitor trust is lost.

Limits and risks

Click-through rate alone says nothing about revenue: always check alongside it how many people bought, subscribed, or stayed on the page.
Some clicks do not come from real people but from bots, accidental touches, or intentional click fraud, which distorts the numbers.
With few impressions, the metric is unreliable: two clicks out of ten impressions equal 20 percent, yet this means nothing.
AI summaries and clickless searches can lower CTR even if your content is good and the machine answers directly from it.

Similar, but not the same

conversion rate – Conversion rate measures how many clickers took the desired action (e.g., purchased), while CTR only tracks up to the click.
Appearance – Impressions count how many times content appeared on someone's screen (they may not have noticed it), while CTR measures what fraction of those resulted in a click.
cost per click – Cost per click shows how much you pay for a click, while CTR indicates a ratio, not a monetary amount.

Related concepts

Broader

online marketing, webanalitika, performance metric

Narrower

Organic click-through rate, Ad click-through rate, email click-through rate

On the edge

conversion rate, Appearance, cost per click, zero-click search, search engine optimization

A brief history

The metric was born with online advertising: in 1994, the first clickable banner ad, recognized as such, appeared in the HotWired web magazine, and since then advertisers have measured what share of impressions results in a click. With the spread of search advertising billed per click, it became one of the basic metrics of online marketing by the early 2000s.

Where things stand

At the end of 2026, CTR remains the basic metric of every advertising and analytics system, but its meaning is changing: because of AI summaries and chatbots, more and more searches end without a click. The industry therefore also tracks whether content appears, and is cited as a source, in AI answers.

Status: 2026 November

In the news

Appears in 8 Agent Age stories; the curve shows weekly occurrence in the news magazine.

AI Overviews and AI Mode bring minimal clicks as search patterns shiftNov 2, 2026 · Marketing
Google Ads AI Max automatically enabled in some Ad Grants accountsOct 19, 2026 · Marketing
Google tests AI contribution payments for publishers as click-through rates fallOct 7, 2026 · Marketing
UK CMA set to force Google to open up AI Overviews, putting publisher revenue at stakeSep 28, 2026 · Marketing
New data: AI search reduces clicks to websitesSep 21, 2026 · Marketing
AI Overviews may be affecting Google Shopping ad click-through rates and impressionsSep 7, 2026 · Marketing
Publishers report traffic drops from Google AI Overviews, with data from the US, France and SwitzerlandAug 24, 2026 · Marketing
Measurements of AI Overviews' impact: fewer clicks and falling CTRAug 17, 2026 · Marketing

Also known as

CTR · click-through rate · click-through rate · click-through rate · click-through rate · clickthrough rate · click through rate · organikus CTR

Sources

Google Ads Help: Clickthrough rate (CTR) – Definition

This entry was machine-edited and has undergone machine expert review; the “In the news” section updates automatically from Agent Age stories.