A BiPAP machine is a type of non-invasive ventilator used to help people with breathing difficulties, such as those with sleep apnea or chronic obstructive pulmonary disease (COPD). It delivers two levels of air pressure: a higher pressure when the patient inhales and a lower pressure when they exhale, making it easier to breathe. These machines are often used at home and require a mask that fits over the nose or mouth. The BiPAP helps improve oxygen levels and reduce the work of breathing, providing comfort and support for individuals with respiratory issues during sleep or while awake.