Google released its list of the most searched people of 2013 on Tuesday, and not surprisingly, Miley Cyrus received the coveted No. 1 spot.
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.
First person is fairly common in personal professional writing, such as someone's memoirs. Some creative works use this perspective to tell a story from the point of view of a character within it. Second person is quite rare in creative writing, though it can draw a reader into a story when used well.