Domains:

A domain name is an identification label that defines a realm of administrative autonomy, authority, or control in the Internet, based on the Domain Name System (DNS).

Unless you have already registered one, you will need a Domain Name for your website. You can choose a Top Level Domain such as .com, .net or .biz, or (and usually cheaper) a second level domain such as .co.uk, or .org.uk. If your organisation expects business or traffic from more than one country, then a top level domain might be important, but better exposure in a single country will be achieved with a country-specific domain such as .co.uk. UK directories or UK-specific searches normally include only domains containing .uk

Top Level Domains (TLDs) are:

 .COM
Short for .commercial. Domain names with the .com extension are by far the most popular, and can be purchased by any individual or business.

 .NET
Short for .network, this domain extension was originally designed to be used by technical Web sites. However, domains using this extension can be registered by anyone.

 .ORG
Short for .organization. Originally designated for non-profit firms and any other organizations that did not fit under the .com or .net extension, any individual or business may now register a .org domain name.

 .INFO
Short for .information. .INFO has been introduced in 2001 and is for both businesses and individuals. In 2005, the total number of .INFO domain names registered is getting closer to the much older .ORG extension domains.

 .BIZ
Short for .business. .BIZ is dedicated to the business community and an ideal alternative to the crowded .com space. With .BIZ users can get a great name and expand their online presence.