Joomla is a very powerful PHP-based CMS which makes managing your website easy with a raft of plugins, themes and tutorials available across the internet. To install it:

1. Login to cPanel.
2. Go to the Installatron Applications Installer Icon.
3. Scroll down to Apps for Content Management and select Joomla.
4. Proceed to click "install this application".
5. Follow the prompts to confirm which domain it's being setup for, the directory it's installed to along with your admin settings.

It is recommended that you always install the latest version of Joomla and ensure you keep it up to date.