As more businesses do their selling online, "shopping cart solutions" have become popular ways to reach out to customers. Companies with an online presence use shopping cart solutions to help visitors browse products and select and buy items. Knowing about some of the key terms for ways that businesses set up shopping cart systems can help an Ecommerce beginner figure out the best way the company can get and retain customers over the web. Payment gateways and merchant accounts As pointed out by ecommerce experts, shopping cart solutions are not usually fully integrated models for transaction processing. Instead, a shopping cart solution tends to be a user interface, with the actual transactions being routed to what many call a "payment gateway." Shopping cart functionality Shopping cart functionality means a cart with built-in software features can do different things for customers. "Add to cart" functionality, for example, means customers can easily add items to their own shopping carts online. "Save for later" functionality means customers can come back to the online site and follow through with their prior actions. ISP When it comes to setting up a business shopping cart system online, an ISP, or Internet Service Provider, can be a handy helper. A business with a need for more Ecommerce installations can talk to the ISP about developing a customized solution. Cookies Cookies-small electronic files that reside on the computer-are popular for getting and keeping customer data on Internet shopping cart sites. A cookie is any bit of data that is stored on a computer to provide information on a visitor. Conversion This handy term is useful for talking about how many regular visitors actually buy something from a site. Tracking conversion is often a necessary way to do return-on-investment research. URL The URL, also known as a web address, is the location of your shopping cart. Getting a customized URL is often one of the first steps in putting together a shopping cart Ecommerce site. Managers can buy or rent specialized web addresses otherwise known as "domain names" from big holders, such as Yahoo.