P.S I think execution of these asynchronous bits is all together a different topic. A callback function can offer several benefits in your JavaScript code, such as asynchronous programming ...

A callback in which ... and when it takes time for execution. A callback is a simple function that’s passed as a value to another function, and will only be executed when the event happens. We can do ...

this is how we invoke the execution handling both the fulfillment and rejections. By using in-place anonymous function definitions where we have to place a callback is considered a very bad practice ...