A subdomain is a part of a web address that's under the main domain name, for example name.example.com. Technically, even in www.example.com the "www" part is a subdomain because the fully qualified domain name is only "example.com". Each subdomain can have its own website and records and can also be hosted using a different provider if you want to use a certain feature that isn't offered by your current provider. An illustration for using a subdomain is if you have a business site as well as an online store under a subdomain where customers can buy your products. You can also have a forum where they can comment on the products and by using subdomains rather than subfolders you'll avoid any chance of all sites going down when you perform maintenance, or update one of the website scripts. Keeping the sites separated is also less risky in case of a script security breach.
Subdomains in Shared Hosting
Every shared hosting package that we provide will enable you to create many subdomains with no more than a couple of mouse clicks inside your hosting CP. They will all be listed in the area in which you create them and grouped under the main domain for more convenience, to help you easily monitor them all. In addition, you can access many functions for any one of the subdomains via right-click context menus - for example, you can view or change their DNS records, access the website files, and more. While creating a new subdomain, you're also going to have numerous options that you can select from - specify the default access folder, set unique error pages, activate FrontPage Extensions or decide if the subdomain will use a shared or a dedicated IP address. The number of subdomains you are going to have is completely up to you since we have not limited this feature for any one of our plans.
Subdomains in Semi-dedicated Hosting
If you buy a semi-dedicated server plan, you're going to be able to create as many subdomains as you'd like as this feature is unrestricted. Since the hosting packages are quite powerful, we have decided not to put any cap on the amount of subdomains. Our sophisticated Hepsia CP will enable you to create a new subdomain with no more than a couple of clicks, to select which folder it will access inside the account, to activate FrontPage Extensions for it, to create custom error pages, to create a shared or a dedicated IP address if you have one, and many more. To make it easier for you, all of the subdomains will be listed under their root domain, so you can easily see and control them. Using fast access links, you'll be able to open the site files for any one of the subdomains that you have or check out its DNS records.