The World Wide Web uses unique numbers called IP addresses and every unit or website that is a part of the Web has this type of an address. It would be pretty hard to remember to visit 184.108.40.206 to load a website though, so a significantly easier structure was made in the 80s - domain names. Every domain name consists of a main part and an extension, to give an example domain.com or domain.co.uk. Many different extensions exist worldwide - part of them are given to countries, like .co.uk in the aforementioned example, which is assigned to the United Kingdom, while many others are generic, for example .com or .net. Some extensions are available for registration by any kind of entity and others have certain requirements - business registration, local presence, and so on. You can obtain a brand new domain through a registrar company like ours and when the extension allows transfers, you can move an existing domain name between registrars as well.