The World Wide Web uses unique numbers known as IP addresses and each device or website that is a part of the Web has such an address. It would be pretty difficult to remember to visit 123.123.123.123 to open a website though, that's why a much simpler structure was created in the 1980s - domains. Every single domain name consists of a main part plus an extension, to give an example domain.com or domain.co.uk. A number of extensions exist worldwide - part of them are given to countries, just like .co.uk in the aforementioned example, which is assigned to the United Kingdom, while others are generic, like .com or .net. Some extensions are available for registration by any kind of entity and others have particular requirements - business registration, regional presence, and so on. You can get a new domain name through a registrar firm such as ours and when the extension allows domain transfers, you'll be able to shift an existing domain between registrars as well.