Some people may assume that ghosts and poltergeists are the same, but there are some differences that will help you distinguish one over the other. A ghost can usually manifest almost everywhere. There are some who say that ghosts may get stuck in places that they used to love when they were alive. Some also say that there are some ghosts that may haunt those who have done them wrong.
Poltergeists have a tendency to be mischievous. There are also times when they can already cause harm to those that they are haunting. Some poltergeists can manifest because of their fixation with one person, or sometimes, they may also get fixated at a certain place.