CampaignReel

Ad placement specs against what generators output

Where the call to action lives: overlay or in the frame

Two placement help pages describe text the platform lays over an ad: call-to-action buttons, headlines and captions. One generator documents the other half, a final card inside the video carrying brand, product name, tagline and call to action, because the shots themselves cannot be relied on to spell anything. As of 2026-10-13.

Text the platform adds, and text the video carriesThe platform lays call-to-action buttons, headlines and captions over the ad, outside the file. The video itself carries what the platform cannot add: the brand inside the picture, which one generator puts on an end card because shots cannot be trusted to spell.Laid over by the platformInside the videoWhat it isButtons, headline, captionAn end card with four linesWho designs itThe platform, from a few fieldsThe advertiser, line by lineCan it linkYes, buttons do; captions do notNoLanguageThe fields as typedThe ad's dialogue languageKeep the card short where a caption will sit over it
Fig. 1 Clickable parts belong to the platform; the brand name belongs to the file.
What each surface puts on screen to name the advertiser and say what to do next. Recorded 2026-10-13.
ItemWhat is publishedDetail
Google Ads, in-feedTwo call-to-action buttons in a Video action campaignOne to the final URL, one to the video
Google Ads, mobile MastheadA headline, description texts and an external call to actionChannel name and icon pulled in automatically
SceneMixer, end cardBrand, product name, tagline and call to action on the last cardIn the ad's dialogue language; edited without reshooting
TikTok, ad captionUp to four lines taken from the organic captionUniform white font; no links, @ symbols or hashtags

Inclusion rule. Text elements described on a placement's own help page or on a generator's own guide. Visual elements a platform renders without documenting them are not counted. Order. Alphabetical by surface.

1The platform owns the clickable part

Every clickable element on these pages is added by the platform: two buttons on an in-feed ad, an external call to action on the mobile Masthead. None of it is part of the uploaded file, and none of it can be designed by the advertiser beyond a headline and a few lines of description.

TikTok's caption is stricter still. It is taken from the organic post, limited to four lines, set in one font that cannot be changed, and cannot carry a link, a mention or a hashtag.

2The video has to carry the name

What the platform cannot add is the brand inside the picture. A generated ad has a specific problem there: the guide for one generator states plainly that video models do not write legible text, so a logo or a product name asked for inside a shot is unreliable.

Its answer is a card at the end of the cut with four lines, any of which can be left blank, edited after the ad is made without reshooting the shots, and written in the ad's dialogue language rather than in English by default.

3Overlays and a card compete for the same space

TikTok's safe zone shifts with the dimension of the video and the length of the caption. A card whose lines sit near the bottom of a vertical frame is exactly where a long caption lands, so the shorter the caption, the more of the card the viewer reads.

That is a planning point rather than a specification, and it is one reason to keep the card's lines short: a brand and a call to action survive an overlay that a full tagline may not.

  • Call to action on in-feed ads
    In a Video action campaign, in-feed video ads include two call-to-action buttons, one linking to the final URL and one to the videoGoogle Ads Help, video ad formats / recorded 2026-10-13
  • Call to action on the mobile Masthead
    The mobile video Masthead carries a customizable headline, description texts and an external call to action, and pulls in the channel name and iconGoogle Ads Help, video ad formats / recorded 2026-10-13
  • Text TikTok lays over an ad
    Ad captions come from the organic post, show at most four lines in a uniform white font, and support no clickable links, @ symbols or hashtagsTikTok Ads help, video ad specifications / recorded 2026-10-13
  • Where on-screen elements can sit
    The safe zone depends on the video's dimension, the caption length and any additional formats usedTikTok Ads help, video ad specifications / recorded 2026-10-13
  • Where the call to action sits
    The final cut ends on a card carrying brand, product name, tagline and call to action, editable without reshooting the shotsSceneMixer, end card guide / recorded 2026-10-13
  • Why the card exists
    The guide states that video models do not write legible text, so the end card is where the brand name reaches the viewerSceneMixer, end card guide / recorded 2026-10-13
  • Language of the card
    The card is written in the ad's dialogue languageSceneMixer, end card guide / recorded 2026-10-13

4Sources

Format requirements come from Google Ads Help and tool limits from each vendor page listed on published limits, both read 2026-10-13. The rule against mixing the two is on method. Nearby: Product photo, TikTok specs, Shape by platform.