Async Programming is a programming paradigm that allows tasks to run concurrently, improving efficiency and responsiveness. Instead of waiting for one task to finish before starting another, async programming enables multiple operations to be initiated and completed independently, which is particularly useful in applications that involve I/O operations, like web requests or file handling. In many programming languages, such as JavaScript and Python, async programming is implemented using constructs like promises, async/await, or callbacks. These tools help developers write code that can handle multiple tasks at once without blocking the main thread, leading to smoother user experiences and better resource utilization.