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.
For questions about the copyrights of the StackExchange sites themselves or about the posting of copyrighted material by users.
Indicates that the feature request will not be implemented, or that a bug will not be fixed at present time.
Users may only earn a certain amount of reputation each day, with the exception of reputation coming from accepted answers and bounties.
Ceiling and floor of the number of characters you can enter into various slots
Questions about suspected user spam, the Spam Flag or combating spam as a community
For issues with how Stack Exchange sites look or work that are specific to Google's Chrome browser.
For questions or issues surrounding login to this site.
For questions about single users having multiple accounts.
General questions about users and user accounts.
Per-site lists of tags that cannot be created.
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".
For questions about the official Stack Exchange Android App.
to be used for the Official Stack Exchange application only. The app is available in the App Store, for iOS 7 on iPhones only. When posting bug reports, please specify the app's version.
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…
The "Linked Questions" sidebar is a user-generated list of related questions shown when viewing a question. Its content comes from questions that users have linked in the question, their answers, or i…
Questions about how welcoming the site is to new users and fosters and community spirit among existing ones.
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.
For questions about various userscripts and bookmarklets.
A user's accept rate is the percentage of questions for which the user has accepted an answer.
For questions regarding the badge tracking functionality in the user profile area.
For questions involving the "Front Page" - the list of top questions with activity.
Locking a question prevents answering, editing, commenting, voting, closing, and reopening. Answers must be locked separately and may still be voted upon. Only diamond moderators may lock posts.
For questions and discussion related to (ab)use of the site in the context of exams.
For questions and requests to merge multiple Stack Exchange accounts of the same user.
For questions about how Gravatars are fetched and displayed on the Stack Exchange network. This is not for general Gravatar support inquiries.
For questions on Captcha, the program used to distinguish humans from bots.
The undisclosed algorithm through which all new questions are passed to determine if they can be posted on SE.
When your question gets the community to have a vote
Scraper sites are websites copying content from other websites. Use this tag for questions related to sites copying contents from math.SE. (In particular, if this is done without proper attribution.)
For questions related to defining own macros (using \newcommand and similar commands) in MathJax.
For questions about the CSS styles used in Marthematics SE.