A Content Management System (CMS) is a software platform that produces and maintains content on the web. Users can simply choose a preexisting theme, then enter their content into a simple interface the provider has already done all of the Web design and programming work. Many also handle backups, security issues, Web forms, version control, site search, and more.
The purpose of a CMS is to make creating and managing a website as easy as possible. CMS users are typically small businesses, organizations, and individuals who do not have the staff, time, or knowledge to run a full-fledged website. Many CMS providers also offer technical support. More large companies are also using these solutions, due to the convenience they offer.
WordPress is an open source CMS.