Hostname

A host name (alternatively spelled, a hostname; also known as a domain name, host device name, host device alias, and, with regard to the Internet, Internet host name; hereinafter, the Name) is a label or alias that is assigned to a particular IP address or another identification for a host device that is a part of the Internet or another computing network.

This label is used to identify the IP address of the needed device in various forms of electronic communication, such as the World Wide Web.

The Name is the central part of any URL.