Horror films are a genre of cinema designed to elicit fear, dread, and shock from the audience. They often explore themes of the unknown, the supernatural, and the macabre, utilizing suspenseful storytelling and unsettling visuals to create an immersive experience. Iconic examples include Psycho and The Exorcist, which have left a lasting impact on the genre. These films can vary widely in style, from slasher flicks to psychological thrillers, often featuring elements like monsters, ghosts, or serial killers. The genre has evolved over the years, with modern horror films like Get Out and Hereditary pushing boundaries and redefining what scares us.