definition of perspective in photos
Perspective distortion is influenced by the relationship between two factors: the angle of view at which the image is captured by the camera and the angle of view at which the photograph of the subject is presented or viewed
Within my own words perspective is a different way of looking at something within a photo. You as a photographer need to try to take a photo in a way that most people wouldn't see an object or a scenery. Perspective needs to be used in order to make a photo interesting.