This guide demonstrates how to create a Next.js application using App Router to fetch knowledge base articles via React Server Components, leveraging caching and rendering methods to optimize page speed and user experience. The application is integrated with Contentful to enable on-demand revalidation and draft mode, allowing content editors to preview their content before it's published to the public. The guide covers setting up a new Next.js project, creating listing and detail pages for knowledge base articles, configuring Contentful to communicate with the website, deploying the application to Vercel, and enabling on-demand revalidation and draft mode.