2 Answers

It moves the question to the top of the unanswered page so it's visible. You can use it as many times as needed to get an answer. Once the question is answered, the bump button goes away. 

13 years ago. Rating: 3
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It places the question back on the first page (unanswered) so more people get a chance to see it and possibly respond.

13 years ago. Rating: 3
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