A domain name is part of a Uniform Resource Locator (URL), which is the address of a site or document on the Internet. In general, a domain name is comprised of a second-level domain, a “dot,” and a top-level domain (TLD). The wording to the left of the “dot” is the second-level domain, and the wording to the right of the “dot” is the TLD.
A domain name is usually preceded in a URL by “http://www.” The “http://” refers to the protocol used to transfer information, and the “www” refers to World Wide Web, a graphical hypermedia interface for viewing and exchanging information. There are two types of TLDs: generic and country code.