A dolly rig is a filmmaking tool used to create smooth camera movements. It consists of a wheeled platform, called a dolly, that allows the camera to glide along tracks or move freely on flat surfaces. This setup helps filmmakers achieve professional-looking shots, enhancing the visual storytelling of a scene. Dolly rigs can be used for various types of shots, including tracking shots, where the camera follows a subject, or static shots that require precise positioning. They are often used in conjunction with other equipment, such as tripods and cranes, to provide versatility in capturing different angles and perspectives.