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.
Considerations. Third person is the most common point of view in all genres except young adult fiction where first person is more common. It is the viewpoint that we are most familiar with as readers and so the transition to writing third person is quite natural.