A smoke machine is a device that produces a dense vapor, often used in entertainment settings like theaters, concerts, and dance clubs. It works by heating a special fluid, usually a mixture of water and glycol or glycerin, which creates a thick fog when vaporized. This fog enhances lighting effects and creates an atmospheric environment. Smoke machines can also be used for practical purposes, such as in fire drills or safety training, to simulate smoke without the dangers of real fire. They are commonly found in film production, haunted houses, and theme parks to create immersive experiences for audiences.