Immunotherapy is a revolutionary treatment approach in cancer care that harnesses the body’s immune system to fight cancer cells. Unlike traditional treatments such as chemotherapy and radiation therapy, which directly target cancer cells, immunotherapy works by stimulating the body’s natural defense mechanisms to recognize, attack, and destroy cancer cells. Immunotherapy has shown remarkable success in treating various types of cancer, including melanoma, lung cancer, kidney cancer, and certain types of leukemia and lymphoma. It offers the potential for durable responses, fewer side effects compared to traditional treatments, and improved quality of life for many patients. However, immunotherapy is not effective for all cancer types or patients, and its effectiveness can vary widely from person to person. Overall, immunotherapy represents a promising frontier in cancer treatment, offering new hope and opportunities for patients with advanced or previously untreatable cancers.