Uploading your ad creative
There are two methods you can use to upload your ad creative.
Uploading ad creative to your ad item
The most direct approach is to upload your files when you create a ad item. This is done by selecting "Library" checkbox and choosing "Browse..." to upload your file. This will automatically add the file to your Media Library and attach it to the ad item.
Uploading ad creative to the Media Library
Another way to upload your files is to add them to the Media Library first, and then linking to those files when you create your ad item. Any files you've previously uploaded to your Media Library can be linked to a ad item by using the dropdown after selecting the "Library" checkbox.