Subdomains are very useful if you wish to create a page on your site, which is to be accessed through an easy-to-remember unique URL. Say you want to create a forum for your site, which people will be able to access when they type forum.yourdomain.com in their browsers.
You can do that by you logging into your cPanel > Subdomains and typing “forum” in the Subdomain field. The Document root will be filled automatically with the name of the subfolder (which will also be called “forum”). If the actual subfolder name is different, you can edit the field.
Should you experience any difficulties you can always contact our 24/7 Support Team who will gladly help you out.