React useCallback: When and how to use it for better performance

The useCallback hook in React helps optimize performance by memoizing functions and preventing their recreation on each render. This is particularly useful in avoiding unnecessary re-renders of memoized child components. The article demonstrates its application with examples, such as optimizing event handlers in an e-commerce app. It also compares useCallback with other related hooks like useMemo, useEffect, and useRef to highlight different use cases. Proper usage of useCallback can significantly enhance the efficiency of React applications.