A content management system is software that keeps track of every piece of content on your Web site. Content can be simple text, photos, music, video, documents, or just about anything you can think of. A major advantage of using a CMS is that it requires almost no technical skill or knowledge to manage. Since the CMS manages all your content, you don't have to.
What's types of CMS are available?
Many Content Management Systems are available. Here are just a few: