Pricking the pizza bases allows the air to escape, so the base is "flat" and crispy.
When my kids were here, we used to make pizzas in the kitchen oven. Max temperature, 550°F - not really high enough, so I´d put the bases on a ceramic tile (in the oven) for a minute before I put the topping on. When I pulled them out to cover them, they´d have bubbles all over them. For me, no problem; my youngest son used to prick them with a fork for a flatter base.
Me, personally, I like a base with "bubbles" on it.
When my kids were here, we used to make pizzas in the kitchen oven. Max temperature, 550°F - not really high enough, so I´d put the bases on a ceramic tile (in the oven) for a minute before I put the topping on. When I pulled them out to cover them, they´d have bubbles all over them. For me, no problem; my youngest son used to prick them with a fork for a flatter base.
Me, personally, I like a base with "bubbles" on it.