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 favorite question feature or the favorite tags feature.
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 about the "on hold" status, which used to occur for the first five days that a question is closed.
Questions about the live Markdown preview of posts as they're being typed.
For questions regarding changing the tags of questions to better or more relevant ones.
Indicates that the site developers were not able to replicate the behavior reported.
For questions concerning citation posts from MSE and citation of other resources when posting here.
A post ban means that a user is blocked from asking new questions, or posting new answers.
For requesting clarification on a specific flag. Flagging again with a custom flag may also be an option.
For question related to missing context close reason.
Cross Posting refers to posting the same question over multiple Stack Exchange sites.
Proposals for new entries for the FAQ repository on this site should use this tag.
For questions related to using various languages on math.SE.
For questions both about the built-in editor for this site and also for questions about preparing posts using different programs.
For questions about the user named Community ♦ present on Math.SE (and other Stack Exchange sites).
Moderation tools are available to users with a reputation of 10000.
This is tag for questions related to some other site from SE network. MathOverflow has its own specific tag (mathoverflow). If you want to ask about a site proposal, use (area51) tag.
These questions are the most frequently asked and answered questions on Meta.
For questions about the Winter Bash (or holiday hats) to celebrate the end of the year.
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.
For issues regarding the help center of Mathematics Stack Exchange.
For questions about the public lists of changes made to posts by a site's users. They are available for questions and answers by clicking the "edited X min ago" link, and on tag wikis as "history" and…
For questions regarding usernames.
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 that have as their purpose the celebration of a milestone, either for a specific user or the site.
For questions about posts that ask for/give hints.
For questions about the mobile versions of Stack Exchange sites. For questions about the mobile apps, use the [android-app] and the [ios-app] tags as needed.
The black bar across the top of every Stack Exchange site
For questions about exporting and printing MSE posts.
Spoilers are text which is hidden until you move cursor above it. It might be useful when for separating full solution from a hint.
should be used when you are expecting a large number of diverse answers to a question.
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…