UGC ads on Meta and TikTok: specs, hooks, structure, budget
A UGC ad for TikTok or Meta is shot in vertical 9:16, full screen, sound on. Our rule of thumb is 15 to 30 seconds, with the hook in the first 3 seconds, the product on screen and one clear CTA. The structure: hook, problem, product, proof, CTA. Don't bet everything on a single video: test several hooks, angles and creators, compare them on the same budget, then boost the winner from the creator's handle with Spark Ads (TikTok) or partnership ads (Meta).
Official specs by platform
Short answer: vertical 9:16, full screen, sound on. The platforms allow long videos, but none of them asks you to use that length. Here is what their own spec pages said on 30 September 2026.
| TikTok (in-feed ads) | Instagram Reels ads | YouTube Shorts ads | |
|---|---|---|---|
| Ratio | 9:16 recommended (16:9 and 1:1 accepted) | 9:16 | 9:16, "best suited" to Shorts |
| Duration | Up to 10 minutes; no restriction for Spark Ads | 0 seconds to 15 minutes | Under 60 seconds recommended; 10 to 30 seconds for action-oriented ads |
| Timing | Proposition in the first 3 seconds, hook within the first 6 | No guidance on the spec page | No guidance beyond length |
| Sound | Use sound or music | Optional, strongly recommended | Use sound: music, voice-over or both |
| Captions and text | Captions or text overlays, 5 to 10 words per second | Optional, recommended | Text overlays suggested |
| Safe zone | Safe zone templates provided | Keep at least 14% free at the top, 35% at the bottom, 6% on the sides | Not specified |
Sources: TikTok Ads Help, in-feed ad specifications (updated June 2026) and creative best practices (updated June 2025); Meta Ads Guide, Instagram Reels; Google Ads Help, YouTube Shorts ads asset specs. Checked 30 September 2026.
Our rule of thumb for UGC ads is 15 to 30 seconds: long enough for the hook, the problem, the product, the proof and the CTA, short enough to hold attention. It is in line with Google's guidance for action-oriented Shorts ads. Shoot native vertical, never a cropped landscape video, and plan for captions: Meta lists them as recommended and they carry the message for people watching with the sound off.
This guide is about ads. For a catalog of formats (review, demo, tutorial, before and after, screen recording for apps), see UGC video formats.
The hooks that work
The hook is the first 3 seconds: they decide whether the video gets watched or scrolled past. Here are 5 templates to give as angles in your UGC brief (the creator rephrases them in their own words; the brief guide has a bank of 15, and our list of 50 UGC hook examples sorts them by type):
- The problem: "If you struggle with [problem], watch this." Speaks directly to the viewer's pain.
- The result: "I tested [product] for 7 days, here's what happened." Promises a transformation, so it has to be true.
- The visual surprise: a gesture, a before and after, an unexpected detail in the first second.
- The question: "Why is nobody talking about this?" Creates instant curiosity.
- The reversal: "I was skeptical, and then…" Disarms distrust toward ads.
A structure that converts
Beyond the hook, UGC ads usually follow a 5-beat arc. Spell it out in the brief:
Hook (0 to 3 s)
A hook that stops the scroll (one of the 5 templates above).
Problem (3 to 8 s)
The frustration the viewer recognizes. You build identification.
Product (8 to 18 s)
The product enters the scene, shown on screen, doing the task, not as a catalog shot.
Proof (18 to 25 s)
The result, the verdict, the concrete detail that makes it credible.
CTA (25 to 30 s)
A clear, single call to action: "link in bio", "10% off today".
Budget and number of variations to test
Ad performance comes from testing, not from one "perfect" video. The right instinct: produce several variations (different hooks, angles and creators), run them in parallel, keep the ones that stand out and cut the rest.
- One variable at a time. Same product, same offer: change the hook first, since it decides whether the rest of the video gets seen.
- A fair comparison. Same budget per variation, same audience, same period.
- The right metrics. Hook rate (3-second views divided by impressions), hold rate (share of viewers still there at the end), click-through rate and cost per result.
- Iterate on the winner. Give the budget to the best video, then test new hooks on its body.
The media budget comes on top of production: see our UGC pricing guide to budget both. On UGC Pocket, several creators each publish their own take on the brief, which gives you variations to compare. Price: from €2,000 per campaign, no subscription, price and terms set out in the commercial proposal. Details on the Pricing page.
Boost the winner from the creator's handle
Once you've found your winning creative, you can run it from the creator's handle rather than only from the brand's account. That's whitelisting: Spark Ads on TikTok, partnership ads on Meta.
- TikTok Spark Ads use organic TikTok posts in your advertising. One way to set them up: the creator generates an authorization code from the post's ad settings and sends it to you, and you add it in Ads Manager. Our guide to TikTok Spark Ads with creators covers each step and the duration to ask for.
- Meta partnership ads run on Facebook and Instagram from a creator's or partner's handle. The creator grants permission per post or for the whole account.
The ad keeps the creator's identity: it reads as their post rather than a brand ad. On UGC Pocket, creators publish on their own TikTok and Instagram accounts; reuse of the videos in ads or on your site is defined in the commercial proposal. It's all detailed in our guide to UGC usage rights and whitelisting.
Sources: TikTok Ads Help, Spark Ads creation guide (updated June 2026); Meta for Developers, partnership ads (no date shown). Checked 30 September 2026.
Frequently asked questions.
How long should a UGC video be for ads?
There is no single official length: TikTok accepts up to 10 minutes for standard in-feed ads and Meta up to 15 minutes for Reels ads. In practice, aim for 15 to 30 seconds, in line with Google's 10 to 30 seconds for action-oriented Shorts ads. Put the hook in the first 3 seconds and end with one clear call to action.
What format for TikTok and Reels?
Vertical 9:16, full screen, designed with sound on. Keep key elements out of the areas covered by the interface, add captions, and avoid cropped landscape videos.
How many variations should you test?
Several rather than just one: start with different hooks on the same product, then different angles and creators. Give each variation the same budget and audience so the comparison is fair.
What makes a good UGC hook?
A hook that stops the scroll in the first seconds: point at a problem, promise a result you can prove, create a visual surprise or ask a question. TikTok recommends introducing the proposition in the first 3 seconds.
How do you run a UGC video as an ad from the creator's account?
With the creator's authorization. On TikTok, with Spark Ads, the creator can generate an authorization code from the post's ad settings and send it to you, and you add it in Ads Manager. On Meta, with partnership ads, the creator grants permission per post or for the whole account. The scope and duration of these rights are covered in our UGC usage rights guide.