From theProducts Menu, clickProduct Groups, then click Departments.
Departments are a way of organizing your products so that customers can browse your site more easily, similar to manufacturers and categories. It is not absolutely necessary to use departments, but most sites are going to be improved by this kind of organization.
To create a new department, clickCreate Department. To create a sub-department of another department, click the+ Addbutton in the parent department row. Seethis page for an explanation of all of the fields that can be set for each department.
To assign a product to a department, open that product underProducts > Manage Products, open the product in the grid view and click on theMappingstab. Check the boxes next to the Departments you'd like the product to appear in and click Save.