What is Hook Rate?

Hook rate measures how many people who saw your video ad kept watching past the first three seconds. The standard calculation is 3-second video plays divided by impressions. It is the clearest early signal of whether a creative's opening actually stops the scroll, because it isolates the one moment every video ad has to win: the instant a viewer decides to keep watching or keep scrolling.

Media buyers lean on hook rate because it diagnoses a specific part of the creative. Metrics like CPA or ROAS tell you the whole ad worked or didn't, but they can't tell you where it broke. Hook rate can. If an ad has a strong hook rate but weak conversions, the opening is fine and the problem lives deeper in the video, the offer, or the landing page. If the hook rate is weak, almost nothing else about the ad matters yet, because most of your audience never saw the rest of it. A falling hook rate on a previously stable ad also tends to be one of the earliest signs of creative fatigue.

In practice, buyers compare hook rates across their own account rather than against outside benchmarks, since placement mix, audience, and vertical all shift the baseline. The useful question is relative: which of my current concepts opens strongest, and is a given ad's hook trending up or down over time. A weak hook usually points to a slow open, a first frame with no motion or tension, or an opening line that reads like an ad. It rarely points to a bad offer, so the fix is usually a new first three seconds, not a new product angle.

Common mistakes include judging hook rate on tiny impression counts, comparing video hook rates against static ads (which have no equivalent), and rewriting an entire winning video when only the opening needed work. A cheap iteration loop is to keep the body of a proven ad and test several different openings against it. Track hook rate alongside thumbstop rate in Analytics, and prioritize the concepts that open strongest when you relaunch winners.