Horror films are a genre of cinema designed to evoke fear, suspense, and anxiety in the audience. They often feature supernatural elements, such as ghosts, monsters, or otherworldly beings, and may include psychological themes that explore the darker aspects of human nature. Common tropes include haunted houses, serial killers, and apocalyptic scenarios, which create tension and provoke strong emotional reactions. These films typically use various techniques, such as eerie soundtracks, jump scares, and unsettling visuals, to enhance the viewing experience. Iconic examples of horror films include Psycho, The Shining, and Halloween, each contributing to the genre's evolution and popularity over the years.