Anonymous functions are also known as "function expressions." They are used extensively for various purposes, including callbacks, event handlers, and more.
In the above example, the add variable is assigned an anonymous function that calculates the sum of two numbers. Later, the anonymous function is invoked as add(5, 3) to compute the result. Additionally, an anonymous function is used as a callback in the setTimeout function to execute a delayed action.
Anonymous functions are particularly handy when you need a function for a specific task and don't require reusability across different parts of your code. They are especially useful in scenarios where you want to define functions inline or pass functions as arguments to other functions without explicitly naming them.