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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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inquiring about existing site policies or proposing new ones.
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For questions regarding code golf challenges and/or submissions
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For questions regarding answers posted to challenges
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keywords or labels that categorize and group your question with other, similar questions.
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For questions about scoring a challenge or how to score a particular language
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proposing new rules or asking for clarification on other ones.
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For meta questions pertaining to asking other questions, on main or meta.
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a place where you can post proposed challenges for others to review.
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Requests for help with, or discussion of, a single question on PPCG.
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Questions about the "close as duplicate" mechanism.
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For questions about using the Stack-exchange chat system
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For questions related to guiding new users and helping them get accustomed to PPCG.
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appropriate for PPCG.
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General questions about questions that have been closed because they are off-topic or otherwise do not meet the criteria defined in the FAQ.
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Questions and discussion related to PPCG Meta itself, not just PPCG.
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For clarification of rules that apply to challenges if not mentioned by the author
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either proposing or asking for clarification on winning criteria.
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A question related to a new genre of challenge (for example, [code-golf], [popularity-contest], etc.)
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runnable inline code samples. Currently HTML, CSS, and JavaScript are supported.
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The information this question hopes to provide is something that every user should know.