Fetching data in React applications has been traditionally managed using useEffect and state management, often resulting in boilerplate code and UI flickering. However, with the introduction of React Suspense, the process of handling asynchronous operations like data fetching has become more efficient and declarative. React Suspense allows components to temporarily pause rendering until data is available, displaying a fallback UI in the meantime. In React v18 and onwards, Suspense is fully integrated with concurrent rendering, simplifying tasks such as data fetching, code splitting, and lazy loading without manual state management. It enhances the user experience by managing loading states across multiple components, ensuring seamless transitions when waiting for data, and allowing developers to integrate it without a complete application rewrite. React Suspense is not a data-fetching library or a state management tool but works in conjunction with libraries like React Query to manage loading states declaratively. Through examples and code demonstrations, the text illustrates how to implement data fetching with React Suspense, its integration with tools like React Query, and its improvement over traditional data fetching methods.