There is a long thread, only a few weeks old on the question of "Point of View". You really should take a look at that to get your bearings.
In a nutshell:
1st Person: "Me, Myself, & I."
Whole novel is presented from one character's point of view. This character cannot barge into the inner thoughts of other characters, or see more of the "big picture" than her/his five senses can possibly report. Good POV for telling a personal story. More difficult POV for an epic drama.
2nd Person: "You, yourself, and you?"
nearly impossible to pull of with a novel. Anybody who tries is reaching for seriously avant-garde creds. POV makes the reader a front-line character, directly involved with the story. Nice idea, but ridiculously off-putting in practice.
3rd Person Omnicient: Story teller is above and beyond all characters and can see all. Story teller can show the reader the most private thoughts of any character. The only restriction on the narrator is that he/she cannot be a character in the story, nor address the reader - person to person. POV was used widely in the olden days to great effect, but has recently become unfasionable.
3rd Person Limited (shifting): Story teller is omnicient, but focuses on one character at a time. In any given scene, only one character's thoughts can be known, and all other information is filtered through this character's point of view. General statements of universal truth can be ventured, but if such facts are beyond the comprehension of the chosen character, the story teller is in technical violation of the POV.
Objective: No inner thoughts of any character are directly available. Dialogue and action play out as if on a movie. The story teller is limited to a "play by play" account of the scene. Any subtext must be coded into the dialogue and actions of the characters.
That's my assessment... I'm not an expert, so take it all with a grain of salt.