Lists stats of your game. All stats on this page add to your statistics total, which is then multiplied by the number of monuments you have built. This gives you your total statistics multiplier, which contributes to your rebirth multiplier. This is capped at your god multiplier, as shown on the rebirth tab.
As you climb through the P. Baals, eventually your god multiplier will exceed your statistics multiplier, greatly slowing the rate at which you gain rebirth multiplier from defeating more P. Baals. When this happens, it's probably time to stop and do challenges (while all stats contribute to the multiplier, completed challenges will probably account for most of it), or spend 50 god power to double your statistics multiplier.