Third party
HTML and JavaScript snippets from third-party ad servers.

Recognized third-party creative vendorshttps://support.google.com/admanager/answer/177366?hl=en&ref_topic=28159&authuser=0

Third party ad validator: https://h5validator.appspot.com/3pas/asset

HTML5 
HTML5 zip file (standalone file - extracted file max size 1000 kb). (requirements: https://support.google.com/admanager/answer/7046799?hl=en&ref_topic=7041998)

Image banners
Standard images or URLs of creatives hosted on third-party ad servers (remote images)
File types: gif, jpg and png. (max size 50kb)

Bannersizes on desktop:

SKY: 300x600, 300x250

INLIST: 980x120, 930x90, 728x90

Bannersizes on mobile device:

320x320, 320x160, 320x100, 320x80, 320x50