Lifting state up in React involves moving shared state from child components to their nearest common ancestor, enabling proper data flow and communication between sibling components. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented state lifting patterns in thousands of React applications for dashboard filters, form management, and component synchronization. From my expertise, the most effective approach is identifying shared state needs and moving state to the closest common parent with callback props for updates. This method provides centralized state management and clear data flow throughout the component hierarchy.