Provide a brief overview of asynchronous coding and explain why it is important in JavaScript programming. Chose one of the possible techniques available for asynchronous coding, such as promises, and provide an example of how they may be used. Consider situations or ways in which asynchronous coding might be useful in a JavaScript application. For instance, you could discuss how async requests can be used to handle client-to-server communication or process time-consuming tasks. What are some advantages of using asynchronous coding techniques, and what are some tradeoffs?