Every Web site has its own unique address, called a URL (Uniform Resource Locator). If you want to visit a site, you need to type in its address, in the address bar of your browser as shown.

Each URL is divided into the following sections:

http:// – is short for hypertext transfer protocol and means that the file is a Web page. You do not need to type this part in as it will be automatically inserted by your browser it.
www – denotes the World Wide Web
bbc – indicates the company name
.co – shows the type of organisation (company).
.uk – states the location of the organisation

The organisation and location of the address of the address is known as the domain name.