The phrase refers to the duration required to bring a pizza stone to a temperature suitable for baking. Achieving this temperature ensures optimal heat transfer for a crisp crust. For example, instructions might state a preheating time of 30-60 minutes.
Proper preheating is critical for a successful pizza-baking experience. It allows the stone to accumulate and radiate sufficient heat, leading to a uniformly cooked base and preventing a soggy center. A well-heated stone mimics the environment of a traditional brick oven, improving overall texture and taste.