The document provides information about Wikipedia, including that it was founded in 2001 by Larry Sanger and Jimmy Wales as a free, online, collaborative encyclopedia. It started as Nupedia and is available in many languages. Wikipedia aims to be a neutral compilation of facts maintained through five pillars, though it is also criticized for potential lack of reliability from anonymous contributors and errors. The document discusses factors that contribute to Wikipedia's success, such as openness, easy usability and fast access, as well as debates around bias and mediating disputes on controversial topics.