Stem cell donation involves collecting stem cells, which are special cells that can develop into different types of cells in the body. These cells are often used to treat various medical conditions, including certain types of cancer, blood disorders, and immune system diseases. Donors can provide stem cells from their blood or bone marrow, and the process is generally safe and well-tolerated. The donated stem cells are then used in stem cell transplants to help patients recover from their illnesses. This procedure can restore healthy blood cell production and improve the patient's overall health. Finding a matching donor is crucial for the success of the transplant.