A CMS or Content Management System is a software application that allows users to create, manage and publish digital content, typically on a website, without requiring specialized technical skills. It provides a backend interface where users can easily create and edit content, add media files, adjust the layout, and manage various other aspects of the website. With CMS, businesses can easily operate websites, update content regularly and keep them relevant to their audience. CMSs include popular options like WordPress, Drupal, and Joomla.