Cookies per click are a major element in Cookie Clicker. You start off with one cookie per click, so 15 clicks lets you buy a cursor. Each cursor upgrade upgrades Cookies per click. There are also mouse upgrades, which increase your Cookies per click by 1 percent per cookies per second. The golden cookie upgrade and wrath cookie effect Click Frenzy boost cookies per click by 666 for 13 (If Get Lucky is purchased it is 26 seconds.) If dragonflight is gotten you get times 1.111 cookie production for some time (If Get Lucky is gotten the time is doubled.) Wrath cookie upgrade Cursed Finger is gotten for 10 seconds (plus two if Lasting Fortune gotten) makes cookies per click be ten seconds of cookies per second. If you get get lucky, all three things are doubled.
Cookies per click can never go below one.