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When I ask a question (usually on Stack Overflow) I often get answers or comments very quickly. How do people know my question has been asked? Along the same lines, if I'm interested in helping to answer a question about a certain topic, how do I hear about new questions on that topic?
Is it possible to subscribe to a tag and be notified when a new question that uses that tag is posted? That would seem like the best solution, but I don't see a way to subscribe to tags.