Service Design Center uses a change management process to track and approve all changes to any product. All of these changes, including additions, edits, and deletions, must go through the promote-approve-deploy process before they become available.
Any changes you make (change a name, change a price, add or delete a product from a bundle, etc.) to any product do not affect any users that already have the product.
Once you have created a category, you add products to it separately.
For general categories, you can also configure additional settings that will allow you to enhance the presentation of your products in the store.