Higher Order Functions are functions that can take other functions as arguments or return them as results. This allows for more abstract and flexible programming, enabling developers to create reusable code. For example, in JavaScript, a function can accept another function to process data, making it easier to apply different operations without rewriting code. These functions are commonly used in functional programming paradigms, where they help manage complexity by allowing operations like map, filter, and reduce. By using Higher Order Functions, programmers can write cleaner and more efficient code, enhancing readability and maintainability in their applications.