Sharing state between components in React enables data synchronization and communication across different parts of your application through various state management patterns. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented state sharing patterns in thousands of React applications for dashboard widgets, form management, and component synchronization. From my expertise, the most effective approach is using lifted state for simple cases and Context API for complex shared state scenarios. This method provides clean data flow with proper state encapsulation and efficient re-rendering patterns.