Aspect Ratio
The proportional relationship between a video's width and height, such as 9:16 vertical or 16:9 widescreen.
Definition
Aspect ratio describes a frame's width relative to its height. Common formats include 9:16 (tall vertical video for phones), 1:1 (square), and 16:9 (widescreen). The right ratio depends on where the video will be watched.
Why it matters
Each placement favors a different ratio: TikTok and Reels are built for full-screen 9:16, feed placements often suit 1:1, and YouTube is traditionally 16:9. Using the wrong ratio means letterboxing or cropping that wastes screen space and can hurt performance.
How it applies to UGC ads
Most UGC ads are vertical 9:16 to fill the phone screen on TikTok and Reels. UGCABC can export multiple ratios so the same ad fits different placements without re-shooting it for each one.
Related terms
UGC Ad
A paid advertisement made in the casual, authentic style of user-generated content rather than as a polished brand commercial.
ReadB-Roll
Supplemental footage cut in over the main shot to illustrate what's being said and add visual variety.
ReadThumb-Stop (Scroll-Stopper)
Creative compelling enough to make someone physically stop scrolling their feed — the goal of a strong opening visual.
ReadSpark Ads
A TikTok ad format that boosts an existing organic TikTok post as a paid ad, keeping the original post's likes, comments, and account.
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