A. First Person
B. Second Person
C. Third Person
A teacher supervises fourth graders on the playground. Three students approach the teacher.
The FIRST kid tells the teacher, "I was walking across the playground when a ball hit me in the head."
The SECOND kid says, "That's not what happened! You weren't walking across the playground; you fell off the slide because you were walking up the slide instead of sliding down."
The THIRD kid witnessed the whole event. He explains, "Sam was walking across the playground when Scott threw the ball directly at his face. He was laughing when Sam got hit."
Each child tells the story from a different point of view. The first boy is the main character in his own statement; the second talks to the first, using the pronoun you as the main character; and the third kid narrates the story, in which he is not a character, but an observer.
Perhaps that makes point of view easier to understand.