Guide
Shorts is YouTube's swipe feed, and it plays by feed rules: your ad is one flick away from oblivion at every moment. This guide covers how the placement works, what it costs relative to in-stream, and how to make sure your creative survives the swipe.
Shorts ads run between organic videos in the Shorts feed, served through a Google Ads video campaign — select Shorts as a placement, or let automatic placements route a vertical video there if it meets the specs. The specs themselves are familiar: 9:16 vertical, 1080×1920 recommended, MP4 or MOV, up to 60 seconds in the feed. The defining feature is the skip mechanic: there is no five-second countdown like in-stream. Viewers swipe past your ad exactly the way they swipe past any Short, from frame one. Your opening isn't protected — it has to compete.
Shorts CPMs are commonly reported in the low-to-mid single-digit dollars up to around $12 — meaningfully below typical non-skippable in-stream rates. Cheap reach is the opportunity; the catch is that impressions in a swipe feed are only as valuable as your creative's ability to hold them. A weak opening converts that low CPM into a high effective cost per watched second. The economics only work if your hook rate holds up.
The first second is the whole game: open mid-action, with a claim, a question, or something visually wrong enough to demand a second look. A logo reveal or slow product pan gets swiped before the music starts. Design for sound on — Shorts viewers mostly listen — but caption anything essential. Keep it native: ads that look like Shorts get watched like Shorts, which is why UGC-style creative tends to travel well here. And although the slot allows 60 seconds, 15–30 is the sweet spot for completion — the same short-beats-long logic covered in our ad length guide. Shorts also sit next to YouTube's skippable in-stream slot, which plays by a stricter clock — see how to test a skippable pre-roll ad if that's where your budget is going.
Because Shorts punishes weak openings instantly, the highest ROI step happens before launch: score your variants while they're still files on your desktop. PreTestAds predicts viewer engagement from the creative itself — Hook Strength in the first 3 seconds, where attention drops, the peak moment, and whether engagement survives into the CTA window — scored as a percentile against 76 curated top-performing short-form ads. Cut or re-edit the weak variants, then put real budget behind the contenders and let watch time and cost per result confirm the call. Pre-testing screens for attention, not conversions — it's the filter before the live test, not a substitute for one.
Upload your vertical video and get predicted Hook Strength and attention scores in minutes. Up to 8 free credits, no credit card.
Test Your Shorts AdShorts ads run inside the Shorts feed between organic videos, served through Google Ads video campaigns. They're vertical (9:16), up to 60 seconds, and viewers skip them the same way they skip any Short — by swiping. There's no countdown timer protecting your opening.
The placement allows up to 60 seconds, but 15–30 seconds is the sweet spot for completion. Shorts viewers are in a fast-swipe rhythm; an ad needs to earn every additional second, and most ideas don't need more than 30 to hook, demonstrate, and ask.
Yes. Predictive pre-testing scores your Shorts creative on attention and engagement before launch — including how strong the first 3 seconds are, which is the make-or-break window in a swipe feed. It complements a live campaign test rather than replacing it.