The World Wide Web employs unique numbers known as IP addresses and each device or site that is a part of the Web has such an address. It would be pretty difficult to remember to go to 123.123.123.123 to load a website though, so a much simpler structure was introduced in the 1980s - domains. Every single domain contains a primary part as well as an extension, for instance domain.com or domain.co.uk. A large number of extensions exist globally - part of them are given to countries, just like .co.uk in the abovementioned example, which is assigned to the United Kingdom, while others are generic, for instance .com or .net. A number of extensions are available for registration by any kind of entity and some others have particular requirements - business registration, local presence, etcetera. You can get a new domain name from a registrar organization such as ours and if the extension supports transfers, you will be able to shift an existing domain name between registrars too.