The car water pump regulates the temperature of the engine by working with the radiator to make sure it doesn’t overheat and prevent the car running. If the engine water pump becomes worn or stops working, then this could cause damage.
The water pump gasket forms an integral seal to prevent leaks. If this becomes damaged you will notice the coolant leaking. But, there’s no need to worry, as the part is easily replaceable as a value for money price.