Guide
An attention curve turns "the ad feels slow in the middle" into a timestamp you can actually edit. Here's how to read its four key regions and act on each one.
An attention curve is a line plotted along your ad's timeline, where height represents predicted engagement at that moment. Read left to right it tells a story: how hard the opening grabbed, how well the middle held, and whether anyone was still there when the offer appeared. The value isn't the single overall score — it's the shape. Two ads can earn the same average and behave completely differently: one holds steady, the other spikes and collapses. The shape is where the edit lives.
The first three seconds set the ceiling for everything after. If the curve starts low, the rest barely matters — you're losing people before the content begins, and no clever middle recovers an audience that already swiped. A strong start is a high opening that doesn't immediately plunge. This region maps to hook rate, the post-spend metric you'd otherwise only learn after buying impressions. If the opening reads weak, fix it first with the techniques in ad hook examples before touching anything else.
Every curve falls — the question is how and where. A gentle slope is normal and healthy; viewers naturally thin out. A cliff is the problem: a sharp vertical drop at a specific second means something there is actively pushing people away. Go to that timestamp and look. The usual culprits are a setup that runs too long, a branding card that interrupts the story, a scene change that pays nothing off, or a pacing lull where nothing new happens. The fix is almost always subtraction — cut the dead beat or move a stronger moment earlier so the line never gets the chance to fall.
Two regions decide whether attention converts to action. The peak is your strongest moment — ideally it sits near your offer, not stranded at second four where it does nothing for the sale. The CTA window, the final 20 to 30 percent of the ad, is where you ask for the click; if the curve has already collapsed by then, your call to action is playing to an empty room. PreTestAds labels exactly these regions — Hook Strength, Attention Drop, Peak Moment, and Purchase Signal — so "the ending feels weak" becomes "attention died at 0:11, three seconds before the CTA." That diagnosis is the heart of ad creative analysis, and it's often the missing explanation behind why ads don't convert. A predicted curve is a screen, not a promise — it tells you which cut to launch, and live testing confirms it.
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