Point of view explains what a person is thinking of a certain subject or topic.
For example - Lauren saw Ryan cheating on the test. Lauren's point of view - He didnt study for the test. Ryan's point of view - I get free answers!
Third person limited is when only the narrator knows all of the characters thoughts. The narrator describes the characters as "they, he, she" etc. But there is only one certain character that the narrator sticks to most the time. That character is also known as the MAIN character.