Oxygen therapy is a medical treatment that provides extra oxygen to individuals who have difficulty breathing or low oxygen levels in their blood. This therapy can be delivered through various methods, such as nasal cannulas, face masks, or oxygen tanks, depending on the patient's needs. It is commonly used for conditions like chronic obstructive pulmonary disease (COPD), asthma, and pneumonia. The goal of oxygen therapy is to improve oxygen supply to the body's tissues, helping to alleviate symptoms like shortness of breath and fatigue. It can be administered in hospitals or at home, allowing patients to maintain a better quality of life while managing their respiratory conditions.