A shared web hosting plan offers everything you need to create and maintain a website. Shared hosting plan subscribers are provided with one cPanel control panel through which they can manage all of their domains. While you can operate a number of domains and/or subdomains on a single shared hosting plan, the plan does not support reselling.
Reseller hosting is a plan designed to let you sell web hosting packages to your own clients. You, in effect, become the owner of a web hosting business. A HostPapa reseller hosting package includes an unlimited number of cPanel control panels: one for each domain or each person to whom you sell web hosting. As the reseller host, you may use WHM control panel to manage all your accounts.
Useful video tutorials:
WHM Reseller Videos: http://hostpapasupport.com/tutorials/Tutorials_whm.shtml
cPanel Videos: http://hostpapasupport.com/tutorials/Tutorials_Cpanel.shtml