A content management system (or CMS) is a software application that enables you to create, edit, and store digital content. In other words, a CMS is a piece of software that runs on a web server and allows you to easily create, edit, and manage content published on a website.
The website data is stored in a database. The CMS platform takes care of all the technical aspects around building and managing a website. The end user can use a WYSIWYG text editor that looks like a word processor to create, publish, ...