why-is-node-running helps diagnose why your Node.js process won't exit. It identifies lingering timers, open handles, and pending requests that prevent graceful termination, offering insights into problematic asynchronous operations. This is invaluable for debugging and optimizing Node.js applications, ensuring clean and predictable shutdowns by pinpointing the underlying causes of indefinite process hangs, making it easier to resolve potential memory leaks or resource mismanagement issues.