Domain names are the unique addresses that websites use to identify themselves on the internet. When someone visits your website, they will type in your domain name (ex. www.mydomain.com) rather than your IP address (123.123.1.123). Domain names can be purchased, leased, or registered free of charge. There are a number of different domain name suffixes that are available, and each has its own set of advantages and disadvantages. Some suffixes, like .com and .net, are more popular than others. It is important to choose a suffix that will be easy for people to remember and type into web browsers.