This can identify your business, company name or organisation on the World Wide Web. There are a variety of domain name formats available, each appropriate for different organisations. These numbers are written in dotted decimal form, for example 203.63.84.156, and each one is unique. These addresses are known as domain names. A domain name identifies a specific administrative group or organisation on the Internet and, just as each IP number must be unique, each domain name must also be unique.
Domain names comprise sets of labels, each of which tells something about the site.
The labels become more specific from right to left and each label is separated by a full stop. For example, the British convention for academic sites is ac.uk. The ac label is also used in various European countries. When you have your own domain name you are free to add extra labels to the left of the registered domain name to construct a variety of addresses. A label can identify various things, for example, host machine names and aliases for host names.