React Performance Optimization: Lazy Loading

To provide an alternative component if the lazy component fails to load
To define what to render while waiting for the lazy component to load
The fallback prop in React.Suspense is used to define what to render while waiting for the lazy component to load. When a lazy-loaded component is being loaded, the fallback UI (typically a loading indicator, spinner, or placeholder) will be displayed to the user. This provides visual feedback during the loading process and improves user experience by giving an indication that something is happening, rather than showing a blank screen or having the UI freeze.
To specify a timeout before showing an error
To set up error handling for the lazy component