Integrating a content management system (CMS) with Next.js is a straightforward process that involves using a CMS, such as Prismic, to manage and fetch content via API calls. This approach offers significant benefits for website management, allowing both small-scale and extensive content flexibility. By following a simple tutorial, developers can create a new Next.js app, set up Prismic as the CMS, and utilize Prismic's Slice Machine to create a custom repository that models content through Custom Types. These Custom Types, defined with fields like UID, Rich Text, and more, enable users to manage page content easily and allow content updates without altering the codebase. Once connected, the CMS content is fetched using Next.js's getStaticProps() function and rendered on pages using Prismic components, demonstrating the dynamic content capabilities of Next.js and Prismic. The guide further encourages exploration of Prismic's advanced features, such as Slices, which enhance content management by bringing a component-based workflow to content editing.