cPanel

cPanel is a web hostingHostingThe process of storing and serving website files on a remote server, making them accessible to visitors around the world.
More About Hosting control panel that lets you manage your websites and all server tasks from a hosting account. 

With cPanel (Control Panel), you can check your web serverWeb ServerHosts and delivers web pages.
More About Web Server resources, organize website files, manage backups, create email accounts, and more. Most hosting providers feature a cPanel, which allows even non-tech-savvy users to manage their hosting without needing to tweak the code. 

You can usually log in to cPanel after purchasing a hosting plan. The Control Panel commonly includes all the essential features needed to control your website via a user-friendly interface. For example, you can set up a CMSCMSA content management system is software aiding users to create, manage, and modify website content.
More About CMS, access/add/edit files, reach the MySQLMySQLA widely-used open-source relational database management system (RDBMS).
More About MySQL databaseDatabaseAn organized collection of data, typically stored electronically.
More About Database, etc. 

cPanel is not free since it’s included in your web host as a third-party applicationApplicationA software program designed to perform specific functions or tasks on electronic devices, such as smartphones and tablets, computers, and smart TVs.
More About Application. However, most hosting providers let you use it without paying extra fees.