The Cart page is a required page that allows users to manage the contents of their cart. There are three associated widgets: Cart, Cart Summary, Mini Cart.
Cart displays the contents of the cart. The widget contains the Update button to change the quantity and Delete to remove the item from the cart.
Cart Summary displays the cart’s subtotal, any applicable taxes, the total amount, and the Checkout button.
Mini Cart displays the cart’s contents and an Edit Cart button that links to the Commerce Cart widget. The Mini Cart widget has to be deployed on the same page with the Cart widget.