Voluntary blood donors are individuals who willingly donate their blood without any financial compensation. They play a crucial role in maintaining an adequate supply of blood for medical treatments, surgeries, and emergencies. These donors are typically motivated by altruism, a desire to help others, and the knowledge that their contribution can save lives. Blood donation is often organized by organizations such as the Red Cross or local blood banks. Donors must meet specific health criteria to ensure the safety of both the donor and the recipient. Regular blood donation helps maintain a stable blood supply, especially during times of increased demand, such as natural disasters or medical crises.