The percentage of AI-search impressions where a brand's listing causes a user to stop scrolling for at least half a second.
01What it is and how it works
When an AI-search engine generates an answer, it may include a brand's name, logo, or product snippet. If that element is visually distinct enough to interrupt the user's natural scrolling motion, the interaction is logged as a thumb-stop. The ratio aggregates all such stops over total impressions to produce a percentage.
Thumb-Stop Ratio shows how often a brand's AI search result makes a user stop scrolling briefly.
02What to do about it
First, review your brand's appearance in AI answers by checking the snippet length and visual contrast. Second, add structured data that favors rich elements like logos or product images. Third, run A/B tests with different calls-to-action to see which version yields a higher stop rate.
03How it is measured or noticed
Analytics platforms that integrate with AI-search APIs record each impression and flag whether the viewport position changes less than a set threshold (e.g., 50 px) for at least 500 ms. The stop count divided by total impressions gives the Thumb-Stop Ratio, usually displayed as a percentage in the dashboard.
04Common mistakes
- Assuming a high ratio always means better sales; it only reflects attention, not conversion.
- Ignoring mobile-specific scroll behavior, which can differ from desktop and skew the metric.
- Using raw impression counts without filtering out bot traffic, inflating the denominator.
- Treating the ratio as a ranking factor for SEO; it is a visibility signal, not a ranking signal.
05Limits
The metric applies only to environments where scroll behavior can be tracked, such as mobile apps or web pages with JavaScript instrumentation. It does not capture attention in voice-only AI responses, and it is often confused with click-through rate, which measures actions after the stop.
06Worked example
"In a test of 10000 AI-search impressions, a brand's logo caused a scroll pause in 1200 instances. Thumb-Stop Ratio = (1200 / 10000) * 100 = 12%."
Frequently asked questions
What is the Thumb-Stop Ratio and why does it matter for brands?
The Thumb-Stop Ratio measures how often users pause for at least half a second when seeing your brand in AI-generated answers. It matters because it signals your brand’s ability to capture attention in competitive AI search results.
How is the Thumb-Stop Ratio calculated?
It’s calculated by tracking viewport position changes during scroll events. If a user scrolls less than 50 pixels for 50 milliseconds or more while viewing your brand’s listing, it counts as a stop.
Can the Thumb-Stop Ratio apply to desktop searches?
No, it only applies to environments where scroll behavior is tracked, like mobile apps or web pages with JavaScript instrumentation. Desktop searches typically lack this tracking capability.
What’s the difference between Thumb-Stop Ratio and click-through rate?
Thumb-Stop Ratio measures attention during scrolling, while click-through rate tracks actual clicks. A high ratio doesn’t guarantee clicks, but it shows your brand is compelling enough to pause.
How can brands improve their Thumb-Stop Ratio?
Optimize snippet length and visual contrast in AI-generated answers. Ensure your brand’s name or logo stands out clearly and appears early in the response.
Does the Thumb-Stop Ratio work for all types of AI answers?
It depends on the format. It applies to generative answers with scrollable content, but not to static results like featured snippets or knowledge panels.
What happens if a brand’s Thumb-Stop Ratio is too low?
Low ratios indicate your brand isn’t capturing attention effectively. This could lead to reduced visibility in AI answers and missed opportunities to influence user decisions.
Asked out loud
spoken, not typedThe same term in the words somebody uses speaking to an assistant rather than typing into a box — written from the situation, which is why each one carries the situation it came from.
It’s how often users pause for half a second when seeing your brand in AI answers. It shows if your brand grabs attention fast enough.
Because if users don’t stop scrolling, they won’t notice your brand. It’s about making your name or logo stand out in AI-generated answers.
Shorten your snippet, boost visual contrast, and make sure your brand appears early. If it’s buried, users won’t stop.