SHOT REVERSE SHOT: When the shot is between two characters and focuses on one at a time (whoever is talking) then moves to the other character when they begin talking.
This image demonstrates the technique that is used to shoot this type of scene.
Match on action is a scene that commences in one shot and finishes in the other.
180 degree rule: When characters have to be shot in the particular angle to avoid mistakes in editing and so it seems that two characters in a conversation are in the correct position.
Or in other words- Looking room