Using async/await with Promises can make asynchronous code easier to read and debug. The await keyword allows developers to wait synchronously for the results of asynchronous actions, like making calls to REST APIs, while pairing it with the async keyword in function declarations provides syntactic sugar for JavaScript Promises. This technique is useful when handling dependent asynchronous tasks or when iterating through a collection of Promise objects using an AsyncIterator. The code example demonstrates how to use async/await to build an action chain that's more flexible and easier to read, while also providing user interface features like a spinner to keep the user informed during long-running processes. Additionally, the code includes error handling with try/catch blocks to handle possible errors raised by rejected Promises.