Amazon Mechanical Turk (MTurk) is a crowdsourcing Internet marketplace that enables users to co-ordinate the use of human intelligence to perform tasks which computers are unable to do. It is one of the suites of Amazon Web Services. The people who request work, called requesters, pose tasks known as HITs (Human Intelligence Tasks), such as choosing the best among several photographs of a store-front, writing product descriptions, or identifying performers on music CDs. Workers can then browse among existing tasks and complete them for a monetary payment set by the Requester.
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Mechanical Turk aims to make access to a 24*7 on-demand workforce simple, scalable, and cost-effective. Businesses or developers needing tasks done(called Human Intelligence Tasks or “HITs”) can use the robust Mechanical Turk APIs to access thousands of high quality, low cost, global, on-demand workers—and then systematically integrate the results of that work directly into their business processes and systems. Mechanical Turk enables developers and businesses to achieve their goals more quickly and at a lower cost than was previously possible.