Establishing Shot
1. An establishing shot in filmmaking and television production sets up, or establishes the context for a scene by showing the relationship between its important figures and objects. It is generally a long- or extreme-long shot at the beginning of a scene indicating where, and sometimes when, the remainder of the scene takes place.
Establishing shots were more common during the classical era of filmmaking than they are now. Today’s filmmakers tend to skip the establishing shot in order to move the scene along more quickly. In addition, the expositional nature of the shot (as described above) may be unsuitable to scenes in mysteries, where details are intentionally obscured or left out.
Source: Wikipedia