You can understand Softaculous by this: https://www.scopehosts.com/secure/knowledgebase/239/Softaculous--1-click-Installer.html
Softaculous is a script library that automates the installation of commercial and open source web applications to a website. It is operated from the admin area of a website Cpanel.
Softaculous is an automatic installer that takes care of the installation of many different web software applications such as WordPress, phpBB, MyBB, Joomla, etc. It will automatically install the software and configure the database, upgrades, and backups for the software.
Yes, Softaculous is a great web hosting tool. If you are new to website and web hosting you should check the Softaculous is included. Wordpress installs in just a few clicks with Softaculous!