One of the great benefits of Google's Display network is that you can run engaging and visually powerful banners on websites that are part of Display network. Image ads can help you grab the user's attention better than standard text ads, and they can help you boost your brand's presence on many different websites across the Internet.
If you already have image or flash ads that you'd like to add to AdWords, make sure they follow the technical requirements outlined in the How it works... section of this recipe. Save them to your computer from which you'll be able to upload them into your AdWords campaigns.
The images must be relevant and clear, and text must be legible. Blurry or poor quality images are against policy, as are any ads that try to trick a user into clicking them, such as system warnings or error messages.