Blood services are organizations that collect, test, process, and distribute blood and blood products for medical use. They ensure a safe and adequate supply of blood for patients in need, such as those undergoing surgery, trauma victims, or individuals with certain medical conditions. These services also conduct blood donation drives to encourage voluntary donations from healthy individuals. They work closely with hospitals and healthcare providers to match blood types and ensure that patients receive the right blood products, such as red blood cells, plasma, and platelets, when needed.