Why is there crust on pizzas?

Answer 1

There is crust on Pizza because of the way pizza is constructed. In a traditional Neapolitan pizza the toppings are spread over a circle of dough, right up to the rim. The pizza is then baked very quickly at a high oven temperature and the base puffs up forming the golden-brown cornicione (border, or crust) around the edge.

Pizza is the classic fast food, or street food, and the method of baking produces a fairly crisp base and crust which enables a slice of pizza to be held comfortably in the hand and eaten one-handed, on the run, so to speak.

Many pizza variations have developed internationally, particularly in Western countries such as the UK, US, Australia, and so on, and some are made with such ambitious topping, or such heavy topping, that it is impossible to lift and eat a slice easily with one hand; some even require a knife and fork, which rather defeats the purpose of what began as and still is a classic design for fast food.

Answer 2

because it makes the pizza easier to grip