A pizza stone turns a gas grill into a stone oven: the stone stores heat and releases it evenly, so the base crisps while the topping stays juicy. On the grill a pizza stone reaches the high temperatures that bake a pizza in minutes - and it works for flatbread and bread too.
Heat the stone slowly with the grill, dust with flour and never place a frozen pizza on it. Wipe the pizza stone clean instead of soaking it; staining over time is normal.