The main function of a content management system (CMS) for websites is to facilitate the creation, modification, and management of digital content without requiring extensive technical expertise. A CMS enables users to easily update text, images, and other media on their site through user-friendly interfaces. This flexibility allows organizations to keep their content fresh, improve SEO, and enhance user experience. Popular CMS platforms like WordPress and Joomla provide various plugins and themes, empowering users to customize their sites according to their requirements and branding.