Next.js, a widely-used framework for building full-stack web applications, introduced the App Router in version 13, enhancing data fetching and reducing bundle size by leveraging React Server Components alongside the existing Pages Router, thus altering the development approach in Next.js. The guide outlines how to implement a notification workflow using Knock, focusing on identifying users, triggering workflows with the Knock Node.js SDK and Server Actions, and integrating the KnockFeedProvider with React Server Components while ensuring application security for production. Knock simplifies the creation of real-time notification feeds by managing WebSockets, messaging patterns, user preferences, presence detection, storage, logging, and frontend UI, offering out-of-the-box solutions through its in-app feed channel and customizable @knocklabs/react-notification-feed library, with the @knocklabs/client library providing a low-level SDK for custom client-side experiences. Users interested in utilizing Knock for notifications can sign up for free.