These are the numbers the network actually enforces on upload, read from the same catalogue the creative studio validates against.
imageThe workhorse unit. 16:9 is preferred; 4:3 and 1:1 are accepted and cropped by the widget, not by us.
squareUsed by list and strip layouts, and by any placement showing four or more columns.
motionAutoplays muted and loops. Must read as an image if autoplay is blocked, so supply a poster.
videoClick-to-watch by default. 6-30s performs best; anything longer is usually abandoned before the CTA.
carouselEach card carries its own headline and landing URL. Card headlines are shorter because they sit under a narrower image.
app_installRequires a 1:1 app icon. Rating and install count render as an overlay on the media.
Presets are benchmarked across the network, so their performance is comparable between campaigns. Custom text is allowed — it simply has no benchmark to compare against.