Thumb-stop ratio

Thumb-stop ratio describes how often an ad makes people pause their scroll in a social feed. The name comes from the physical action of stopping your thumb on a phone screen. It was popularised by agencies and creative strategists as a way to judge the attention-grabbing power of a video or image.

How to calculate it

For video, thumb-stop ratio is usually calculated the same way as hook rate:

Thumb-stop ratio = (3-second video plays ÷ impressions) × 100

Worked example (made-up numbers): an ad delivers 50,000 impressions and 12,500 three-second plays. Thumb-stop ratio = (12,500 ÷ 50,000) × 100 = 25%.

In practice, many teams use "thumb-stop ratio" and "hook rate" interchangeably. If your team uses both, agree on whether they mean the same calculation or different thresholds, and write it down so reports stay consistent.

Static ads

Static images do not generate video plays, so there is no direct equivalent. Teams often look at CTR or engagement rate as a rough proxy for how well a static ad stops the scroll.

Why it matters

A feed is a crowded space. If an ad does not earn a moment of attention, nothing else about it matters. Tracking thumb-stop ratio helps you:

• compare opening frames and hooks across many variations;
• spot creative that relies on a strong pattern interrupt;
• separate attention problems from conversion problems when performance drops.

Pair it with hold rate and downstream metrics, since attention alone does not guarantee sales.