Description: An asynchronous module in the context of web applications refers to a unit of code that allows the execution of operations that do not block the main execution thread. This means that while waiting for the completion of an operation, such as a database query or an external API call, the server can continue processing other requests. This feature is fundamental in modern web applications, where efficiency and responsiveness are crucial. Asynchronous modules use promises or ‘async/await’ syntax to handle operations that may take time to complete, making it easier to write cleaner and more readable code. Additionally, they allow developers to manage errors more effectively, using ‘try/catch’ blocks to capture exceptions in asynchronous operations. In summary, asynchronous modules are essential for building scalable and efficient applications, enhancing user experience by reducing wait times and optimizing server resource usage.