Subdomain is a subdivision on your main domain that you can use for linking or pointing to categories in your website. For example: If you want to create a section for blog in your website then you can create a subdomain blog.yourdomain.com. In this example your main domain is "yourdomain.com" and your subdomain is "blog.yourdomain.com". Other example of subdomains are mail.google.com, whether.yahoo.com etc. You can use your subdomain for redirecting it to your different website. Or you can also create sections/category in your website with different subdomains. To create subdomain from your cPanel you need to follow the following steps: 1) Login to your cPanel. 2) Scroll down to Domains section in your cpanel and click on "Sub Domains" icon. 3) Enter the following details: Subdomain: In the text box next to "Subdomain" type the subdomain name that you want to create and then select the domain on which you want to create the subdomain. Example: If you want to create a subdomain "football.yourdomain.com". Then in the text box you need to enter "football" and select yourdomain.com as the domain. Document Root: In the box next to "Document Root" you don't need to enter anything as folder for your subdomain will be automatically entered i.e. it will be auto filled. 4) After that click on the "Create" button.