The Web Address

Every public Web site has a Web address that distinguishes it from other sites. The address includes a host name and a domain name. The host name is the name of the computer on which the Web server software runs. The domain name is the public name for a group of computers.
For example, the Web address www.EricGiguere.com has the host name www (for World Wide Web) and the domain name EricGiguere.com. In some cases, the address includes additional information after the domain name, but usually the host name and domain name together are enough to locate a Web site. The host name is important when there are two or more Web servers in a domain, but can normally be dropped otherwise. By convention, the primary Web site in a domain uses the special host name www.
Your site will need a Web address, so you'll need to obtain a domain name. Finding the right name is harder than it seems. Ideally, the domain name will directly relate to your site's content, because AdSense uses the Web address as one of its inputs when it tries to figure out what your site is really aboutso choosing a good name is important.
History of the Web
An excellent and authoritative history of the Internet and the World Wide Web can be found on the Internet Society's site, www.isoc.org/internet/history/.