In a bowl, mix the water, yeast and sugar. Cover the bowl with a towel and set it aside at room temperature for 10 minutes to activate the yeast.
Add salt, olive oil, flour and knead. Let it rise for at least 1 hour.
Divide the dough in half to make 2 pizzas. If you want to keep the one piece for another time, wrap it in foil and put it in the freezer.
Put a bit of flour on a surface and open the dough with the rolling pin (or your hands) until you have a thin dough. Transfer it to the baking tray where you have placed parchment paper and start adding the toppings for your pizza.
Bake in a preheated oven at 220° C for about 30 minutes (baking time and temperature depend on the oven).
Notes
The ideal flour for pizza is the Italian flour type 00. If you cannot find it, however, use all-purpose flour.