Three Main Types of Hauntings

Residual Haunting
A residual haunting is one of the most popular forms of a haunting. Residual hauntings occur when the spirit experienced something traumatic, such as murder or a freak accident. This energy gets trapped in time, imprinted in the place of which it occurred. This is not an intelligent haunting, thus a residual is comparative to a movie; meaning it plays the event over and over again. There can be no contact made between you and the entity, and the entity is unaware of its surroundings. People who have experienced this type of residual haunting may encounter footsteps, crying, loud and sudden bangs.
A residual haunting can also occur when it's caused by something positive that happened, like an event/party. This energy is imprinted in the space. People who have experienced this type of residual haunting, may have experienced hearing music, dancing, people talking, laughing.

Intelligent/Interactive Haunting
These types of hauntings are more rare, however they do exist. An intelligent entity is one that is able to move objects, speak, and respond directly to instructions and requests of a person that's in the room with it. These entities are associated with any type of physical activity, voices, scent, or touch. There are even specific cases where a manifestation of the entity is experienced.
Intelligent hauntings can be a result of, a traumatic incident, unfinished business, emotionally attached and/or distraught, fear of passing over, unaware that they have died, they cannot rest due to an injustice. Generally the entities seem to be attached to particular locations and people.

Demonic Haunting
A demon is an entity that is inhuman. Never has it been a human and never will it be. Those few who have encountered demons report them as being horrific looking creatures, as their sole intention is to frighten you and cause you harm. In a demonic haunting, this entity is generally attached to a single person or location however, demons are able to constantly move locations and follow those whom it's attached itself to. In a demonic haunting, those involved have experienced a variety of sinister and evil encounters. Not only are they intelligent entities, they are also cruel and ruthless energies. They can cause emotional fluctuations, scratch marks and/or bite marks, loud noises, disruptions during sleep or significant celebrations. Demons exist purely to cause chaos and stress in your life. They work to wear you down, and sometimes, they do this as an effort to possess ones bodily form. Demons have also been referred to as soul stealers.
When dealing with a demonic presence one must always be cautious and constantly aware of their surroundings; never provoking the spirit or asking it to come forward. It's commonly believed that demons feed off negative energy, thus the more you send out into the atmosphere, the more likely it is to manifest itself.