Plugins enhance the functionality of content management systems (CMS) by allowing users to add specific features or services without altering the core code. These small software components provide a range of functionalities, from search engine optimization tools to e-commerce solutions, streamlining website management. By using plugins, users can customize their websites based on unique needs and improve user interactions. The availability of a wide variety of plugins promotes flexibility and innovation within CMS, enabling non-technical users to easily adapt and expand their sites' capabilities.