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.
should be used when you are expecting a large number of diverse answers to a question.
For questions about the copyrights of the StackExchange sites themselves or about the posting of copyrighted material by users.
For questions about, well, questions: how to ask, whether specific questions are appropriate, and so forth.
The Stack Exchange Data Explorer (SEDE), located at data.stackexchange.com, allows you to create and run queries against copies of the databases of popular Stack Exchange sites to investigate trends o…
a text which is hidden until you move cursor above it. It might be useful when for separating full solution from a hint.
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".
Per-site lists of tags that cannot be created.
Questions about the "hot questions list" which appears on the main page and truncated on all pages in the SE network, as well as its effect on Math SE.
For questions about single users having multiple accounts.
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.
the percentage of questions for which the user has accepted an answer.
The undisclosed algorithm through which all new questions are passed to determine if they can be posted on SE.
fetched and displayed on the Stack Exchange network. This is not for general Gravatar support inquiries.
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 involving the 'Front Page' - the list of top questions with activity
the act of temporarily blocking the account of a specific user.
For questions and requests to merge multiple Stack Exchange accounts of the same user.
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…
For every user, the reputation from the main site is shown on meta. However scores of the posts on meta are still stored, so it is possible to obtain reputation-based badges on meta (mortarboard, tag …
for questions about the CSS styles used in Marthematics SE.
When your question gets the community to have a vote
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.)
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.
"The Dupehammer" refers to the ability of tag gold badge owners to unilaterally close and reopen duplicates which were asked in tags of which they have a golden badge.
For questions regarding the badge tracking functionality in the user profile area.
distinguish humans from bots.