Immunotherapy delivers a fundamental shift in the treatment of multiple cancers, offering hope for patients with cancer. Unlike conventional therapies, it leverages the patient’s immune system to precisely identify and destroy cancer cells. The remarkable journey of immunotherapy’s has revolutionized oncology and paved the way for the development of modern immunotherapies. Several approaches are applied for immunotherapy, including immune checkpoint inhibitors, adoptive cell therapies, cancer vaccines, tumor microenvironment reprogramming, monoclonal antibodies, cytokine therapies, oncolytic virus therapy and combination strategies. Various immunotherapies are being used for different types of cancers like skin, lung, bladder, kidney, liver, breast and blood cancers. Despite providing an effective cancer treatment, immunotherapies face some challenges in their clinical implementation.