Domain or Domain Name. Although we can access each host on the WWW directly through the IP address, the IP address consisting of 32-bit binary code is very difficult to remember. In order to facilitate the memory, the name given to the computer on the Internet according to certain rules is called domain name.
In layman's terms, a domain name is equivalent to a family's house number. Others can easily find you through this number, which means that there are no duplicate domain names in the world, unique.