You know what you want to do, but your code just isn’t cooperating. Maybe it has a few too many levels of indentation, or chains a half dozen methods, or looks asymmetrical. Whatever it is, something just feels off. You could ignore it – I mean, you have a backlog full of features you still want to write, and it’s really not that bad. But that would be a mistake: Your code is trying to tell you something, and you don’t want to miss it.