If a storage shed, then it is a holding place for ideas, beliefs, attitudes that have not yet been sorted or let go of. A storage space within. If shedding something, then it is about the need to let go of old beliefs, patterns, programs, attitudes, emotions, judgements, limitations and thought processes. A snake sheds its skin, for example, and lets go of the old. Letting go of a burden you are carrying. Are you ready for the new?
See Garage, Snake, Flaw, Old, New, Reptile, Letting Go.