DISPLAY
Link - must be an image called from a <img> tag, and it must be the full URL for that image
Upload
File size: 250 kb
File types: .png, .jpg, .jpeg or .gif
IMPORTANT: Some email clients will not support animated .gif formats, so make sure the first frame works as a standalone!
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NATIVE
Upload only
File size: 250 kb
File types: .png, .jpg, or .jpeg
IMPORTANT:
A native creative can NOT use a .gif, as the whole creative will be processed into a static image.
A native creative can NOT use the Link feature, the file needs to be uploaded.
The image uploaded to a native creative will be cropped according to the styling settings of each placement.