The domain name is the address that people type in their web browser.This domain name points to a set of numbers that contains your web site. These numbers are the "real" address of your location on the server that contains your web site files, and is called the IP address. The reason alphabetical numbers are used for domain names instead of this set of IP address numbers is because these numbers are very difficult to remember. So instead, a domain name is made up of letters and words.