A Content Management System (CMS) is a software application that allows users to create, manage, and modify digital content without needing specialized technical knowledge. It provides a user-friendly interface for organizing and publishing content, making it easier for individuals and businesses to maintain their websites. CMS platforms often include features like templates, plugins, and user permissions, enabling users to customize their sites and collaborate with others. Popular examples of CMS include WordPress, Joomla, and Drupal, each offering different functionalities to cater to various needs and skill levels.