Tuftsin diacetate is primarily utilized in the field of immunology and medical research due to its immunostimulatory properties. It enhances the activity of immune cells, particularly macrophages and neutrophils, making it valuable in studies focused on boosting the body's defense mechanisms. This compound is often explored in the development of therapies for infections, cancer, and immune deficiencies. Additionally, it is used in experimental models to understand immune responses and improve vaccine efficacy. Its ability to modulate immune function also makes it a potential candidate for treating chronic inflammatory diseases and autoimmune disorders.