Third-person omniscient is a narrative style in literature where the narrator knows the thoughts, feelings, and experiences of all characters in the story. This perspective allows the narrator to provide insights into multiple characters, offering a broader understanding of the plot and themes. In this style, the narrator is not a character in the story but an all-knowing observer. This means they can reveal information about the past, present, and future, as well as the motivations behind characters' actions. This technique is often used in novels like Jane Eyre or War and Peace to create a rich, layered narrative.