A name that identifies the IP (Internet Protocol) addresses (which represents a physical point on the Internet), domain names are used in URLs (Uniform Resource Locator) to identify particular web pages. For example, in the URL http://www.bardwebhosting.com/index.html, the domain name is bardwebhosting.com.
The internet translates the domain name into a numerical sequence that is used to identify that particular address within the World Wide Web.
The actual domain name, rather than the numerical identifier, is used to market the domain and should be a name that reflects the business or the owner of the domain. Consider the fact that you will want to use that internet address in your advertising, so choose a name that will reflect you or your business. The extensions to the domain names include: