What is cPanel?
cPanel is the software that controls the behind the scenes functionality of the web space that your website uses.
Using cPanel you will be able to manage all of the features that affect your website. You will be able to add delete and manage Databases, Emails and Domains and much much more. It allows you to manage the security of the website; it has SEO and Marketing Tools as well as site visitor statistics.
cPanel is a powerful tool that should be used only by those that know what the effect of their actions will be.
Without the correct knowledge it is too easy to make changes that can have costly effects. Without an up to date backup you could lose your entire site.
If you have any doubts about the effect of making changes, it is strongly advised that you do not make any changes but ask for help.
More about cPanel
cPanel is a worldwide leading graphical interface and automation tool designed to simplify the process of hosting a web site. cPanel provides extensive documentation to enable you to learn how to use cPanel cPanel Documentation
There are also a great many sites that may compliment this documentation.