A mid shot shows the body from the waist up. It shows some background and whole body language.
Close up shot of a character usually takes in their head and shoulders. It can be used to emphasise the importance a character or object is.
The camera is positioned below (under) the person or place. It can make a person look powerful or important.
The camera is positioned above the person or place. It can make a person look vulnerable, unsecure, unsafe.
Full body is shown. Used to show location and relationships of characters.