The narrative voice in a story or piece of writing plays a crucial role in shaping the reader's experience by influencing the tone, point of view, and overall atmosphere of the work. The way the narrator tells the story, whether it's in first person, second person, or third person, can impact how the reader connects with the characters and events in the narrative. The narrative voice can also convey emotions, perspectives, and biases that can guide the reader's interpretation of the story. Ultimately, the narrative voice serves as a guiding force that shapes the reader's understanding and emotional engagement with the text.