The tutorial provides a comprehensive guide on building a real-time chat application using Next.js and PubNub, highlighting the benefits of using Next.js, such as server-side rendering, automatic code-splitting, and an integrated development environment that supports tools like CSS-in-JS and TypeScript. PubNub's integration offers real-time functionality with low latency, enabling features like message threads, reactions, user presence, and push notifications. The guide outlines steps to set up a Next.js project, install and configure PubNub, create chat components, implement authentication, and deploy the application to platforms like AWS or Vercel. It also includes examples of different chat app use cases, such as group chats or customer support, showcasing the versatility of Next.js and PubNub in creating scalable and efficient messaging applications.