If you plan to sell product on your website, the Product Module is what you will use to sell. The product module works like many of the other modules on your website. You click on "Manage Modules" and then work with the product module. Then when you are ready to add products to your website, you can simply add the product module to a page.
If you want to remove your products from your website for some reason, just delete the module from the page and all of your product information will remain in the back-end for later use.