A domain name is a unique name that identifies a website and helps visitors find it on the internet. It is a combination of alphanumeric characters, such as 'www.example.com' and is used to access a particular website from any computer.

The domain name is an essential part of the internet, as it helps identify a website from others. For example, a website like ‘example.com’ has a unique address and can be found if someone types example.com into their browser.