A narrator is a person or character who tells a story, guiding the audience through the narrative. They can be a participant in the story or an outside observer, influencing how the events are perceived. The choice of narrator can significantly affect the tone and perspective of the narrative, shaping the reader's understanding and emotional response. In literature, narrators can be categorized into various types, such as first-person, third-person, or unreliable narrators. Each type offers a unique lens through which the story is conveyed, allowing authors to explore complex themes and character motivations. Notable examples include Herman Melville's Ishmael in Moby-Dick and F. Scott Fitzgerald's Nick Carraway in The Great Gatsby.