Cookie Clicker is an extremely addictive clicking game where players simply click on a giant cookie to create new cookies. The game starts out very simple, but as you create more cookies, you can buy upgrades like bakeries, farms, and factories to speed up cookie production. With each upgrade, the number of cookies you create will increase. Interestingly, cookie clicker is not just a clicking game, but also has a strategy element, as players need to calculate when and how to optimize the cookie production process.