If you wish to offer certain default images to your clients to use in their campaigns, you can host your images on your account’s Image Library.
To upload images to your Image Library, go under the Library tab and then click on Image library in the left menu. Then, click on the Upload button at the top of the menu. Click Browse to find an image in your computer.
You will see your image successfully uploaded to your Image Library when the process is complete.
Find out about image file sizes and types of files accepted.