Snipcart is a service that lets users add a shopping cart to their website. The cart can be customized using HTML and CSS to make it match the site's design. Snipcart is also capable of adapting to the customer's screen size, allowing it to work just as well on mobile devices as PCs. Snipcart can perform payment processing, shipping estimates, and order management functions, all without taking the customer away from the user's website. Developers can manage information on orders, customers, and discounts using the Snipcart API.