An Asset is any still image (PNG, JPG, or GIF), animated GIF, or an SVG, which can be used in GoTemplate files. Your Asset Library is where assets are stored and managed. Assets can be uploaded to the Asset Library and categorized as one of the following types: Background, Compliance, Logo, or Other.
Media is content that can be assigned to and played in a Zone. The compatible media types are videos (MP4 or FLV), and still images (JPG or PNG). You can find both on the navigation bar at the top of the web portal by clicking My Media and My Assets respectively.