The Shopping Cart is where the total cost of the order can be determined, based on estimated shipping and tax. This is also where coupon codes and gift cards can be applied toward the purchase price. The shopper can change the quantity of items in the cart, or delete items if necessary.
Just like standing in the checkout line, the Shopping Cart is an ideal opportunity to offer one last item. You can carefully select certain items to be offered whenever a specific item is in the Shopping Cart. It’s the classic cross-sell, “Would you like some fries with that?”