Creating nested routes in React Router enables hierarchical navigation structures with shared layouts and complex application architectures. With over 25 years of experience in software development and as the creator of CoreUI, I’ve implemented nested routing extensively in dashboard applications, admin interfaces, and multi-level navigation systems. From my expertise, the most effective approach is using nested Route components with Outlet for child route rendering and shared layout components. This pattern provides organized code structure while maintaining efficient component reuse and consistent user interface layouts.