The guide provides a step-by-step process for building a portfolio website using Strapi as the headless CMS and Next.js as the frontend framework. With this setup, developers can create a visually stunning and highly functional site that showcases their skills and projects while providing a seamless user experience. The guide covers essential topics such as installing and configuring Strapi, creating custom content types for portfolio items, securing API permissions, adding sample content, customizing API responses, and implementing dynamic routing for individual projects and the overall projects overview page. Next.js's Incremental Static Regeneration (ISR) feature is also leveraged to enable automatic updates of static content after building the site. This approach allows developers to maintain control over their portfolio while ensuring excellent performance, SEO, and user experience.