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.
when examining what is on-topic or off-topic, and why.
For questions about the process of editing, how edits work, and other general inquiries about the edit system.
A request to add one tag as the synonym of another tag. Please be specific about which tag should be a synonym of which. Bidirectional synonyms and cycles are implicitly disallowed, so suggest wisely.
For questions about events organized OR.SE or other Stack Exchange communities.
held to choose moderators for all graduated sites and some beta sites.
for questions dealing with moderating actions, pages, abilities or decisions.
used to write mathematics on Stack Exchange sites.
be used when you ask a question on meta that is referencing question(s) on the main site. For example, if you have a question about why questions on OR Stack Exchange are of such low qu…
a feature that can be applied to answers which lowers the barrier for editing and prevents any rep gain/loss from voting. With the introduction of suggested edits, Community Wiki is …
primary means of sorting content so the best posts rise to the top. Voting on content also how users award reputation points to the recipients.
For questions about the syntax highlighting performed inside code blocks on Stack Exchange sites.
for general questions about questions that have been closed because they are off-topic or otherwise do not meet the criteria defined in the FAQ.
for instructions and guidance on closing or migrating questions, and the reasons for those closures.
for questions about tag synonyms (how they work, who can create them, etc.). Use [synonym-request] for tag synonym requests.
For issues related to comments that should have been answers.
when referring to the appropriateness of certain questions or question types on Operations Research SE.
about ethical implications of operations research; examples may concern data privacy, scientific integrity, etc.
for questions specific to downvotes, the community's way of telling peers that their content can be improved. Downvotes on the Meta site have different meanings to on the main site.
a way to get additional attention for a question by offering some of your own reputation for great answers.