Animated GIF images are converted to static GIF images when uploaded.
The maximum image size is 7680 x 7680 pixels.
Images less than 400 pixels wide will display as a thumbnail image.
Horizontal images have an aspect ratio shorter than 1:1. Ads with horizontal images are displayed on both mobile and desktop.
Square images have an aspect ratio of 1:1. Ads with square images are displayed on both mobile and desktop.
Vertical images are supported and have an aspect ratio taller than 1:1. Ads with vertical images are only displayed on mobile.