When making dough, generally, the less water you add/use, the stiffer, more difficult to mix, the dough will become. For the most part, hand formed pizza dough is made with 56 to 58% water based on the weight of the flour. Pressed dough will typically cover the range of 56 to 60%, and sheeted dough will be about the same as hand tossed or maybe just a little less. Water is used to adjust the handling properties of the dough. The more water used in making the dough, the easier it is to work with.
Also, be aware that really stiff doughs are much harder on your mixer than doughs made with more water, and those lower absorption, stiff doughs may not mix at the same speed as a higher absorption dough of the same size. It may require mixing only on the lowest speed for a longer period of time.
Tom Lehmann/The Dough Doctor