Answer :

If first person is someone telling you his or her story, and second person is you being told how you should do something, then third person is more like a camera recording events. That's not to say it's necessarily an objective point of view. A third person narrator can be highly subjective.

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First, second and third person refer to personal pronouns. They three points of view have singular and plural forms.
First person is "I", is someone tell about him (or her).
Second person is "you", 
when you talk to someone you know.
Third person when you talk from a random person.