In this type of narrative, the narrator knows the thoughts and feelings of every character in the story, he is also knows everything that happens, happened or will happen. The word "omniscient" gives us a clue as it means knowing everything. By doing this, the author can make the reader understand one event in different ways, from different perspectives. One thing that could seem bad for a character could appear nice to other. Imagine the narrator as a god that has absolute knowledge of the story's universe. It is important to say that the omniscient narrator always keeps his distance, he never interfers in the events.