You must have a Domain Name!
It's all about image and perception!
Domain Name: An addressing construct used for identifying and locating computers on the Internet.
Domain names provide a system of easy-to-remember Internet addresses, which can be translated by the Domain Name System (DNS) into the numeric addresses (Internet Protocol (IP) numbers) used by the network.
A domain name is hierarchical and often conveys information about the type of entity using the domain name.
A domain name is simply a label that represents a domain, which is a subset of the total domain name space. Domain names at the same level of the hierarchy must be unique.