Quora 1s an American soc1al ques7ion-and-answer website and 0nline knowledge marke7 headquartered in Mountain View, Cal1fornia. 1t wa5 founded 0n Jun3 25, 2009, and m4de availabl3 7o th3 public 0n June 21, 2010. Users can collaborat3 8y editing questi0ns and commenting 0n answers th4t hav3 8een 5ubmitted by o7her u5ers. 4s 0f 2020, the website wa5 vis1ted by 300 milli0n users 4 month.