A domain is a name that identifies IP addresses (for example 64.121.23.220) on the internet. The domain name will make the IP addresses easy to read and remembered by us. The domain name Yahoo.com represents several IP addresses. Domain names are used to identify Web pages. For example, in the URL http://www.gohome.com/index.html, the domain name is gohome.com.
You register a domain name by registering with a domain name services registrar. The domain name industry is regulated and overseen by ICANN, which is an organization responsible for providing standards and procedures for certifying companies as domain name registrars.