Templates and images are the media items used by the site. They are stored as repository items of type Media. A template is a JSP page used to display catalog items. An image is a GIF or JPEG file used on the site, typically to illustrate a category, product, or SKU.
Once you have added an image or template to the catalog, you can specify it as the value of a property of one or more categories, products, or SKUs. For example, you could add a template for displaying certain products, and set the Template property of each of those products to the name of that template.
In the ATG Control Center interface, folders are used to store and organize templates and images. Folders are not part of the actual commerce site.
