Since cancer immunotherapy is an emerging class of treatment, many people find themselves poorly informed on the subject. Despite this, immunotherapy is poised to become the most powerful and widely used form of cancer treatment in the years to come. Already, immunotherapy is recognized by healthcare professionals as the most promising new cancer treatment approach since the production of the first chemotherapies back in the 1940s. Many professionals project that as more research is conducted, more and more immunotherapy treatments will be approved to treat more and more types of cancer. This research is dependent on the use of clinical trials, meaning the only way to get more immunotherapy treatments approved is through the cooperation of cancer patients, doctors, and scientists. Here, we will explore the potential of immunotherapy as a treatment for most (if not all) cancers, as well as discuss the importance of clinical trials to patients and scientists alike.