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.

Moderation tools are available to users with a reputation of 10000.
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The accepted answer is the answer the question owner thought best met their needs. Accepting is encouraged but never required. This tag is for *discussing* issues related to accepted answers, not indi…
A user's accept rate is the percentage of questions for which the user has accepted an answer.
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Questions that discuss the usability of this site by people with disabilities.
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Account suspension is the act of temporarily blocking the account of a specific user. However, circumstances regarding a particular suspension are private matters between the user and the moderators a…
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when asking what is on- or off-topic on the main site, and why.
For questions about the official Stack Exchange Android App.
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For questions about answers on the main site. Consider using the accepted-answer tag if the question is about an answer that has been accepted.
Area 51 is the Stack Exchange Network staging zone, where users come together to build new Q&A sites. New site ideas are proposed, discussed, and the best go on to beta.
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Questions specifically about the process of asking questions on this site.
Auto-deletion is a process which helps cleaning the site by deleting some questions. Criteria for auto-deletion are based on low score and age of the question.
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Badges are awarded to encourage and incentivize positive community actions within the site.
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For questions regarding the badge tracking functionality in the user profile area.
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For questions about the 'being nice' behavior we expect from all Stack Exchange users. What this entails can be found in the help center on every site.
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should be used when you are expecting a large number of diverse answers to a question.
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For questions about the words and phrases which are blocked from appearing in posts or titles.
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From Oxford Dictionaries, paraphrasing to suit the needs of *this site*: "A website or web page on which (in our case) M.SE records opinions, links to other sites, etc. on a regular basis".
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For questions about the favorite question feature or the favorite tags feature.
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A bounty is a way to get additional attention for a question by offering some of your own reputation for great answers.
Indicates a reproducible problem on the site that you believe is due to a mistake, malfunction, or programming error.
Some changes to questions, such as edits or receiving new answers, will "bump" them back onto the site's front page where the changes can be vetted by other users.
For questions on Captcha, the program used to distinguish humans from bots.
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For questions that have as their purpose the celebration of a milestone, either for a specific user or the site.
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Ceiling and floor of the number of characters you can enter into various slots
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For questions about real time web chat that accompanies Mathematics Stack Exchange site.
For questions concerning citation posts from MSE and citation of other resources when posting here.
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For talking about questions which have been closed.
For instructions and guidance on closing or migrating questions, and the reasons for those closures.
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The process by which users can vote a question closed if it is off-topic or otherwise disallowed by the FAQ.
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