Yahoo! Answers
Yahoo! created a free question-answering service and includes many of these questions and answers in their search results.
The idea of integrating Yahoo! user questions and answers directly into the search results shows how much Yahoo! wants to keep their users on the Yahoo.com domain and how much Yahoo! wants to be the most important content site on the web. Compare that strategy to Google who wants to send away visitors as quickly as possible and hope they come back.
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