Commerce covers products and orders. Manage products from Commerce → Products, and view/manage orders from Commerce → Orders.
Products
Each product has a name, description, price, category, and images. Products can also be featured on the public site via the Related Products block — see Content Blocks Reference.
Orders
An order records what a client purchased, its payment status, and its fulfillment status as your team works through it. Orders placed by clients appear in their own portal automatically.