The World Wide Web is based on unique numbers known as IP addresses and each device or web site that is part of the Web has such an address. It would be very hard to remember to visit 123.123.123.123 to load a website though, that's why a much quicker system was made in the 80s - domain names. Each and every domain is made of a primary part as well as an extension, for instance domain.com or domain.co.uk. A plethora of extensions exist globally - some of them are given to countries, such as .co.uk in the abovementioned example, which is assigned to the United Kingdom, while others are generic, such as .com or .net. A number of extensions are available for registration by any kind of entity and some others have precise requirements - business registration, regional presence, etcetera. You are able to get a new domain name via a registrar organization such as ours and if the extension allows domain name transfers, you are able to relocate an existing domain between registrars as well.