There are 3 webs-a-gogo features that work in conjunction with each other to build your Catalog. They are Department Edit, Category Edit and Catalog Item Manager. Simplistically, The Catalog Item Manager is your store. Within that store you have Departments (such as Automotive, Sporting Goods, Household Goods, etc). Within each Department you have Categories (such as Bedding, Accents, Kitchen, etc in the Household Goods Department).
The first step in adding items to your Catalog is to establish Departments. Once you’ve added a Department, you add Categories to each Department. Then you can go to the Catalog Item Manager and add items.