cPanel  (Control Panel) is a graphical webhosting control panel.This is used to simplify the administration of webhosting

cPanel utilizes a 3 tier structure that provides functionality for administrators, resellers, and end-user website owners

Cpanel is where you administer your web hosting account…email,database,stats,domain name etc..

The cPanel is provided by the cPanel Inc.

It is a proprietary product.and it requires monthly license fees.

cPanel is designed to function either as a dedicated server  or virtual private server and it supports Cent OS ,Red Hat Linux, and FreeBSD.