Scroll-stop power is how effectively your content interrupts someone’s scrolling habit and makes them pause to engage. High scroll-stop content has a strong visual + headline combination.
Both matter — but for most platforms the visual stops the scroll while the text (headline/caption) determines if they stay. Neither works without the other.
Post at peak times and track your 3-second view rate (video) or impression-to-engagement ratio (image). Low rates mean low scroll-stop power.