The benefits are extensive or full control over the content of your site without the need for knowledge of HTML, CSS or other web languages. Changes can be made at your leisure depending on what type of CMS you choose. There ise a wide array of content types to work with beyond just text, such as images, audio and video.
SEO Friendly. Websites which update content on a regular basis gain more of a spotlight from search engines and will often rank higher in search engine results (SERP) pages which is an important competitive factor for business websites. Check out what we do with WordPress CMS here.