First things first, what do the letters "CMS" even stand for?
Answer: CMS is an acronym for "Content Management System". You may see some variations on this term, but they all refer to the same concept. Variations include:
In it's simplest terms, Content Management Systems are designed to help users create and manage their websites. A CMS helps webmasters manage the many different resources, content types and various data that make up modern web sites.
To begin using a CMS on your website, you'll need to get it installed on your server. Installation is typically very easy. The most popular systems have created interfaces to guide you through the installation process which can include the creation of a database and changing file permissions. To make things even easier, your hosting provider may have taken care of most of the configuration options already with a "1 Click Installation" feature.