A domain name is a unique string of characters that identifies a website on the internet. It is used to locate and access websites and is typically made up of two or more parts, separated by a dot (.). The part to the left of the dot is the name of the website, and the part to the right of the dot is the domain name extension, such as .com, .net, or .org.
For example, in the domain name "www.example.com," "example" is the name of the website, and ".com" is the domain name extension.
Domain names are used in place of IP addresses (which are a series of numbers) to make it easier for people to access websites. They are also an important part of a website's branding and can impact search engine rankings.
Domain names can be registered by individuals or businesses through a domain name registrar, which is a company that is responsible for managing the registration and assignment of domain names. Once a domain name is registered, it is reserved for the use of the registrant and cannot be used by anyone else.