The `Poll()` function is commonly used in programming to check the status of multiple input/output sources, such as files or network connections. It allows a program to monitor these sources and determine if they are ready for reading or writing, helping to manage asynchronous operations efficiently. In many programming languages, including Python and JavaScript, `Poll()` can be utilized to enhance performance by avoiding unnecessary waiting. Instead of blocking the program while waiting for an event, it enables the program to continue executing other tasks until the specified sources are ready, improving overall responsiveness.