A subdomain is basically an extension of your main domain, which can be managed as if it is a separate web site. Subdomains appear before the main domain name. I.E – subdomain.domain.com. Subdomains are often used to classify larger web sites into various directories and sub directories that can be managed within the control interface more easily.
Subdomains also offer a variety of search engine optimization advantages.
When a subdomain is created, it is actually a new directory that is uploaded to the web server. Any management of the subdomain (such as FTP transfers and content management systems – CMS) must be set up through this directory. In essence, the subdomain is a completely separate site within the same central domain. Most web hosting companies allow for unlimited subdomains on many of their more