What does QFE indicate when set on the altimeter?

When the altimeter is set to QFE, it indicates the height above a specific datum, which is typically the airfield elevation or the reference point at that particular location. This means that when a pilot sets the altimeter to QFE, they will receive a reading that reflects how high they are above that specific surface rather than above sea level. This system is commonly used at airports to help pilots understand their vertical position relative to the runway or the ground during landing and takeoff, thus enhancing the precision of altitude readings in relation to the location being flown over.