Learn how to mutate data and see immediate updates in Next.js 13 through this comprehensive tutorial video. Explore the intricacies of Next.js data caching, the useRouter hook, and the differences between hard and soft navigation within your application. Gain insights into two effective methods for achieving instant data updates, understand the components involved, and learn to implement router.refresh(). Follow along as the instructor reviews the app in VS Code, runs it with JSON-Server, and identifies critical issues. Discover the implications of setting prefetch to false and understand the distinctions between hard and soft navigation. Evaluate whether prefetch is the optimal solution and get a glimpse of upcoming improvements in Next.js data mutation handling.