Crowdsourcing Systems on the World-Wide Web.

The article discusses crowdsourcing (CS) and its facilitation via systems on the Internet. The article defines and classifies CS systems with descriptions of examples, which include the web sites Wikipedia and Yahoo! Answers. CS systems are defined as enduring entities that are collaboratively constructed by a crowd of users for the benefit of an entire user community. The authors also discuss challenges to using CS systems including recruiting and evaluating users and managing the information they contribute. Key insights offered by the article are presented.