Personally speaking, it seems like a complete waste of time to add “www” and a period before the domain name. But most web users identify a website by typing in “www.” before the actual domain name.
The next time you Google a keyphrase, you might see websites that have no “www” or they may have “www2.”
This might cause some confusion.
But the name before the true domain is called a “sub-domain.” And webmasters can assign any name to that sub-domain.
Here are some examples of sub-domains:
www.kimberlykimbrough.com
www2.kimberlykimbrough.com
seo.kimberlykimbrough.com
.kimberlykimbrough.com (no sub=domain)
The use of ‘www’ was traditionally used to indicate that a server was used for serving web content…as opposed to say, ‘gopher’ or other content. Today the majority of Internet content is on the web, so the www prefix could be considered unnecessary by some.