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TikTok UGC ads: formats, specs and what makes them work
Short answer: TikTok UGC ads are vertical, sound-on videos of a person talking about a product, run either as standard in-feed ads from your ad account or as Spark Ads that boost an organic post. They win or lose in the first 2 seconds, so the opening line, first shot and on-screen text matter more than anything else.
What's the difference between TikTok in-feed ads and Spark Ads?
Standard in-feed ads are videos uploaded to your ad account and shown under your brand name. Spark Ads boost an existing organic post, yours or a creator's with an authorisation code, so the ad keeps the original handle, likes and comments. In-feed ads are simpler for high-volume hook testing.
| Standard in-feed ad | Spark Ad | |
|---|---|---|
| What it is | A video uploaded to your ad account | An existing organic post boosted as an ad |
| Shows as | Your brand name, labelled sponsored | The posting account's handle (yours or a creator's), labelled sponsored |
| Engagement | Lives on the ad only | Likes, comments and follows go to the original post |
| Needs | Just the file | The post, plus an authorisation code if it's a creator's post |
Spark Ads from a creator's handle can feel more native, but you depend on the creator keeping the post up and the authorisation active. Standard in-feed ads are simpler to test at volume, which suits hook testing.
What specs should TikTok UGC ads use?
Use 9:16 vertical video at 1080 by 1920 pixels, sound on with a voice to camera, burned-in captions, and keep faces, product and text in the centre safe zone, away from the bottom and right edges. Most product ads run 15 to 30 seconds, with the hook in the first two.
- Aspect ratio: 9:16 vertical at 1080 × 1920.
- Safe zone: keep faces, product and text in the centre. TikTok places the caption, handle and buttons along the bottom and right edge.
- Sound on: TikTok is watched with sound. Voice to camera plus light background audio beats music-only.
- Captions: burn them in anyway, large and high-contrast, for people watching muted.
- Length: 15 to 30 seconds for most product ads.
What makes TikTok UGC ads hold attention
- A face and a line in the first frame. Our own early TikTok posts showed most viewers who left did so around the 2-second mark, which is typical for the format.
- Native framing. Shot on a phone, in a real room. Avoid anything that looks like a TV spot.
- Story or experiment framing. "I tried X for a week", "same script, three people", "the mistake brands make". These outperform plain product presentations in organic feeds and translate well to ads.
- One message. One problem, one product, one call to action.
- Many openings. Test 3 to 5 hooks on the same body. See 48 UGC ad hooks.
Disclosure and AI labels
TikTok requires the commercial content disclosure setting on organic posts that promote a brand, product or service, and labels ads as sponsored. It also asks for realistic AI-generated content to be labelled. Using the labels hasn't been shown to hurt good ads, and skipping them risks reduced distribution or removal. If you use AI presenters, read AI UGC video first.
How to research what's working
- TikTok Creative Center: browse top-performing ads by industry and region.
- Meta Ad Library: many brands run the same creative on Meta; search a competitor to see how long their video ads have been live. Long-running ads are usually winners.
- Your own comments: the words customers use are your next hooks.
For worked examples, see our UGC ad examples breakdown.
FAQ
What's the best length for a TikTok UGC ad?
Most run 15 to 30 seconds. The first 2 seconds decide whether it gets watched, so length matters less than the opening.
What are Spark Ads?
TikTok ads that boost an existing organic post, either from your own account or from a creator's account with their authorisation. The ad keeps the post's handle, likes and comments.
Do I need to disclose a paid creator on TikTok?
Yes. Organic posts promoting a brand need TikTok's commercial content disclosure turned on, and ads run from your ad account are labelled as sponsored.
Can I use AI-generated presenters on TikTok?
TikTok asks creators and advertisers to label realistic AI-generated content. Use the AI-generated content label where it applies, and don't make it look like a real, identifiable person endorsing you.
Can I reuse my TikTok UGC ads on Instagram Reels?
Yes, but upload a clean file without the TikTok watermark. Instagram says it may limit recommendations for content with other apps' watermarks.
3 UGC-style video ads with 9 hook versions to test, delivered in 72 hours. Pay now and send the brief after, or start smaller with a $39 teardown.