A foil in literature is a character who contrasts with another character, usually the protagonist, to highlight specific traits or qualities. This contrast can emphasize differences in personality, values, or motivations, making the main character's attributes more pronounced. For example, in Shakespeare's "Hamlet", the character Laertes serves as a foil to Hamlet, showcasing Hamlet's indecision and introspection. Foils can also be found in various forms of storytelling, including films and plays. By placing a foil alongside the main character, writers create a dynamic that enhances the narrative and deepens the audience's understanding of the central themes. This technique is effective in revealing character development and driving the plot forward.