A domain name is a unique name used to identify a website or online identity. It is used to form an internet address, also known as a URL (Uniform Resource Locator). A domain name consists of a name and an extension, such as .com, .org, .nl, .eu, etc. A domain name can be registered with a domain registration company and is essentially the name that users type into their browser to visit a specific website or to send an email to a particular email address.