Thumb-Stop (Scroll-Stopper)
Creative compelling enough to make someone physically stop scrolling their feed — the goal of a strong opening visual.
Definition
A 'thumb-stop' is an ad — or the opening moment of one — that interrupts the scroll and makes a viewer pause. The related 'thumb-stop ratio' is sometimes used informally to describe how often an ad achieves this, closely linked to the idea of hook rate.
Why it matters
On mobile feeds, the thumb is always moving. If the first frame and first second don't earn a stop, nothing else in the ad matters. Designing for the thumb-stop is why advertisers obsess over opening visuals and hooks.
How it applies to UGC ads
The native, authentic look of UGC is itself a thumb-stop tactic, because it resembles organic posts rather than ads. Testing different opening visuals and hooks — quick to do with UGCABC — is how teams find the variants that stop the most thumbs.
Related terms
Hook
The opening few seconds of a video ad, designed to grab attention and stop the viewer from scrolling past.
ReadHook Rate
The share of viewers who keep watching past the first few seconds of a video ad — a measure of how well the opening holds attention.
ReadUGC Ad
A paid advertisement made in the casual, authentic style of user-generated content rather than as a polished brand commercial.
ReadAspect Ratio
The proportional relationship between a video's width and height, such as 9:16 vertical or 16:9 widescreen.
ReadPut the theory to work.
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