A thriller is a genre of literature, film, or other media that aims to create excitement, suspense, and tension. It often involves a protagonist facing a dangerous situation, such as a crime or a mystery, and typically includes elements like unexpected twists, high stakes, and a fast-paced plot. Common themes include murder, espionage, and psychological conflict. Thrillers can be categorized into various subgenres, including psychological thrillers, crime thrillers, and political thrillers. They often feature complex characters, including antagonists who pose significant threats. The goal is to keep the audience on the edge of their seats, making them eager to see how the story unfolds.