OMNISCIENT is the point of view in a work of fiction in which the narrator is capable of knowing, seeing, and telling all. It is characterized by freedom in shifting from the exterior world to the inner selves of a number of characters, a freedom in movement in both time and place, and a freedom of the narrator to comment on the meaning of actions.
Sometimes called the "God-like" point of view, a writer must be extremely skilled to tackle this successfully. For novice writers, the first or third - person points of view are best. If you try writing a novel in OMNISCIENT POV you will most likely be called on it by your beta readers, with POV CHANGE!! red-penciled into the margins.
(This post has been inspired by and in some instances, directly quoted from A Handbook to Literature, 8th Edition, by William Harmon and C. Hugh Holman)