I think it is more accurate to say that it is a site for fostering a creative practice written about by @JamesAltucher , i.e., write a list of 10 ideas every day to develop your "idea muscle." Doing it on this site just adds the social aspect so you can share ideas with others. You'll get the best explanation from the FAQ, which is a tiny bit hard to find. On the computer, you can find it by clicking on "More" in the lefthand navigation. Or just go here: https://notepd.com/faq/guide