This is where you spend skill points on your Character (Vitality, Agility, Worthiness), Stand, or Fighting Style.
A specialized menu for switching between saved Stands once you have unlocked extra slots. Your Bizarre Adventure GUI
When using a Mysterious Arrow or Rib Cage of the Saint's Corpse , a progress bar or confirmation screen will appear to verify if your "Worthiness" is high enough. This is where you spend skill points on