Quora

Quora is a knowledge-sharing website that operates as a question-and-answer platform. It was founded in 2009 by Adam D’Angelo, former CTO of Facebook, and Charlie Cheever, and launched publicly in 2010. The site enables users to ask questions on any topic and provide answers, which can be edited and improved over time. Members can follow questions, topics, and other users to tailor their feeds, and they may post content anonymously if desired. Answers can be upvoted to signal quality and can be commented on to discuss or request clarification. Quora also hosts sections called Spaces—user-created communities focused on particular topics—where members can share posts and collaborate.

Content on Quora is generated by a broad user base, including professionals, academics, and enthusiasts. The platform relies on a combination of user moderation, reporting, and internal review to enforce guidelines and remove material that violates policies, such as misinformation or copyrighted content. Quora's business model combines advertising with a subscription component, including a premium access program that offers additional content and features to paying subscribers.

Quora has been both praised for providing accessible information and criticized for variability in answer quality and editorial control. It is used by individuals seeking explanations, by researchers looking for input from practitioners, and by publishers seeking to reach specialized audiences.