This document summarizes different types of cancer immunotherapy, including immune checkpoint inhibitors, monoclonal antibodies, cancer vaccines, and nonspecific immune stimulation. Immune checkpoint inhibitors work by removing brakes on the immune system to help it recognize and attack cancer cells. Monoclonal antibodies are man-made versions of immune proteins that can be designed to target specific parts of cancer cells. Cancer vaccines help stimulate an immune response against cancer to help prevent or treat it. Nonspecific immune stimulation generally boosts the immune system in a way that can still help it target cancer cells. The document provides examples of drugs and targets for each immunotherapy type.