What's the benefit of a flashback?
The narration in flashback usually allows the reader to understand the plot and scene of the story faster because it places important events and information at the beginning or end of the story rather than in the middle. This way of narration could arouse the interest and curiosity of the readers, and encourage them to continue reading and better understand the story. In a novel, flashback can be used to emphasize the character, motivation, and goals of the main character or to show the ending or climax of the story. This kind of narration can also increase the complexity and tension of the plot, making the reader more involved in the story. In short, the narration in flashback could attract the reader's attention, increase the tension and complexity of the plot, and thus better understand the story.