Before creating your multiple stores, you need to plan your product category structure. In the Magento GWS hierarchy, websites are assigned to root categories. Root categories are not shown to your visitors, but rather are the top level under which all your subsequent categories reside.
Categories versus catalogs
There can be some confusion when using the terms categories and catalogs. This is due to the fact that Magento uses root categories as a synonym for catalogs. To keep this clear, a catalog is all the categories and products within one group, represented by the group's root category. Any level below the root category is what we will call categories throughout this book.
The following screenshot shows the category ...