A content management system (CMS) is a software application or set of related programs that are used to create and manage digital content.  Joomla! and WordPress are two of many content management systems that are currently used to produce millions of websites around the world today.

Having a Content Management System website means you can easily keep your own website updated without having to hire an expensive web designer.

I install a third party editor that works very much like a word processor.  If you can edit a Word document, you can edit your website pages.

WIX is not technically a Content Management System but it is also easy to edit your website content.  However WIX does offer a great "drag and drop" feature that allows the user to not only change content but to change the website design.