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. The machine consists of a motor, a hose, and a mask that fits over the nose or mouth. It is often used at night while sleeping, providing support to maintain proper oxygen levels and improve overall sleep quality for individuals with respiratory issues.