Why is it important to know your blood type?

Answer: The importance of knowing your blood type is to prevent the risk of you receiving an incompatible blood type at a time of need, such as during a blood transfusion or during surgery. If two different blood types are mixed, it can lead to a clumping of blood cells that can be potentially fatal.

It is to prevent the risk of you receiving an incompatible blood type at a time of need.

Explanation: If two blood types are mixed, it can lead to a clumping of blood cells that can be fatal.