The function of a shopping cart, aka e-commerce design, is basically self-explanitory; it's a piece of software that allows a customer to shop and order online from the company's catalog. A shopping cart add-on allows for the site's users to select merchandise, review their selection, make necessary additions or modifications, and then purchase it. These convenient devices are often found on e-commerce sites (websites that use electrionic communication between two parties in order to tranmit funds, goods, data, or and/or services). If you would like to see a few of examples of shopping cart add-ons we've created.