• .tiff
• .eps
• .jpg
• .png

The correct answers are: .jpg and .png

Explanation: When you navigate to a folder that contains assets, you’ll see the assets listed in the Asset Library. Each asset uploaded to the Asset Library or synced over from the Creatives tab will be identified with a special icon.

Read more here:https://support.google.com/richmedia/answer/6011683