[zincwarrior]

To answer the original question and not interject opinion and ridicule, pistol grip shotguns off the same advantages as a pistol grip rifle, i.e. a more natural wrist position for easier aiming and shooting from just about any position. They seem to be especially popular with turkey hunters who set up in a sitting position with the shotgun pointed in the general direction a bird is expected to come from but without the gun mounted in the shoulder. It takes less movement to shoulder and shoot than a more traditional looking shotgun, which can make a difference with game birds with very keen eyesight. They are also quite popular with some match 3-gun shooters, but I have no experience in that area.

Ditto. Its just a different hand position. Many people like it better than the traditional stock method. Its a purely ergonomic option.