Next.js is a powerful tool for building websites and web applications, but it lacks comprehensive content management capabilities, particularly for internationalization. To address this, headless content management systems (CMS), such as Prismic, can be integrated with Next.js to enhance content management without requiring direct code updates, which is advantageous for non-technical users. The tutorial outlines setting up Prismic with Next.js using Slice Machine, enabling users to create and manage website sections or "slices" that can be customized and previewed locally. This integration facilitates features like A/B testing, personalization, and page layout control, making it easy for both marketers and developers to collaborate on building customizable pages. The guide details the process of configuring the local environment, adding templates, editing pages, and creating new ones, ultimately showcasing the benefits of using a headless CMS for efficient and flexible website management.