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 which focus on the live refresh features such as vote updates and new edit, answer, and comment notifications.
for questions about Stack Exchange RSS feeds (existing or proposed) and the bot in chat that posts messages when preselected RSS feeds are updated
For issues with how Stack Exchange sites look or work that are specific to Firefox.
Questions about the live Markdown preview of posts as they're being typed.
For questions related to user privacy.
fetched and displayed on the Stack Exchange network. This is not for general Gravatar support inquiries.
For posts about security issues centered around Stack Exchange. If you think you found a serious security vulnerability, please report it on the Security page found at https://stackexchange.com/about/…
is used for questions relating to how information is displayed to Stack Exchange users.
Content posted as an answer that doesn't actually answer the question at hand may be flagged "Not an Answer". Note *bad* answers are not eligible for this kind flag.
For issues with how Stack Exchange sites look or work that are specific to Google's Chrome browser.
The component of the SE post editor that allows users to upload images to i.stack.imgur.com and display them in the post.
Indicates that the circumstances behind a bug report are set to be internally reviewed, or that the feature request contains merit to consider but the decision on its approval or decline requires more…
off topic on the site it was asked may be migrated to a different StackExchange site as part of being closed as "off topic", if the users voting to close felt it was good enough to …
A feature of StackExchange chat, "oneboxing" automatically inlines links that are posted on a single line by themselves.
The flagging summary page shows a summary of the flag history for the currently logged-in user.
processed and rendered by the system.
is for questions related to policies of Stack Exchange.
Indicates that the feature request or bug has merit to consider, but will not be implemented or fixed in the near term.
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. **Do not use this tag to bump questi…
is for questions about being notified of Stack Exchange events by email.
Newsletter service (also called 'Digest'), introduced in July 2011, dishing out the top posts of a Stack Exchange site
The new navigation system, in beta test as an opt-in feature on Stack Overflow, Meta Stack Overflow and Meta Stack Exchange
For questions about the badges awarded for specific tags.
Stack Exchange's own OpenID provider, used for "log in with Stack Exchange" and potentially used for logging into other OpenID consumers.
For questions about timestamps that appear in notices and tooltips upon hovering those notices.
manner of conducting oneself in regards to the characteristics/expectations of Stack Exchange
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.
Discussions of the Code of Conduct (CoC), the replacement/revision of the Be Nice policy.
For discussing spelling-related edits, asking about preferred spellings, or reporting spelling problems on the site itself.
For questions about the copyrights of the Stack Exchange sites themselves or about the posting of copyrighted material by users.
For questions about old questions.
Tag filters (AKA the Stack Exchange™ GlobalTag MegaBlender™), as seen at https://stackexchange.com/filters.
answers that are barely more than a link to another page.
for questions concerning actions leading to bad behaviors or bad purposes, considered or suspected to be against Stack Exchange policies or the collaboratively philosophy of any Stack Exch…