Using cpanel, a lot of thing can be done such as setup your own website using fantastico auto-installer, backup your database, and others. To login to your cpanel, just go to http://your-domain.com:2082 or http://your-domain.com/cpanel
After that just enter the related log in information such as user name and password that is provided by your hosting provider. Then you can access all of the features contain in the cpanel.