This is one of the most basic concepts of refactoring.
At the end of the process it should be more obvious where to find things. Think of an office where there was a big filing cabinet and every time mail arrived people just opened and put the contents of the mail into the big filing cabinet but with no well understood filing system.
Refactoring is the basically a person opening up the big dis-organized filing cabinet and trying to sort things out into smaller well labeled folders so it becomes easy to find things.
That’s it.
No big intellectual mystery about what refactoring is.