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.

Questions also answered by the user asking, easily marked by the shaded user card attached to the answer.
327 questions
Users may only earn a certain amount of reputation each day, with the exception of reputation coming from accepted answers and bounties.
321 questions
For questions about linked accounts
307 questions
For questions about fostering a sense of community amongst users of Stack Exchange sites
306 questions
For questions about the profile picture option, which allows users to upload a custom photo as their avatar. Not for questions about Gravatar.
303 questions
an auto-generated image displaying a user's total reputation and badge counts on one Stack Exchange site or across all of them.
288 questions
For questions about comment @replies, also called pings.
282 questions
the little blurbs that pop up when you hover an element in a web page. They are typically taken from an element's "title" attribute.
281 questions
Questions about the legal aspects of Stack Exchange sites, such as the terms of service, using content and/or code-snippets, attribution, copyrights, patents, using trademarks, etc.
274 questions
light-hearted but hopefully of some additional use beyond mere entertainment.
270 questions
The process by which users can vote a question re-opened if it is closed due to some users seeing it as off-topic or otherwise disallowed by the /faq.
268 questions
Every user's account profile has a section showing the recent reviews, revisions, comments, badges, posts (questions and answers), and accepts.
266 questions
Activities such as searching, voting, editing your own posts, or suggesting edits are rate-limited on Stack Exchange sites. These restrictions generally exist to prevent abuse.
262 questions
A dropdown containing recent reputation, badges, and privileges earned across all Stack Exchange sites
258 questions
Can the site(s) be used by specified users to achieve specified goals?
258 questions
Friendly comparison chart showing the reputation gains and losses between users on a site
254 questions
A request to reopen a *specific* closed question, or receive further explanation of why it was closed. If your request is to reopen a closed question, it should be one here on Meta Stack Exchange. If …
249 questions
Times a question has been seen by eyeballs, or a profile has been looked over
248 questions
For questions about the various RSS feeds provided by Stack Exchange sites.
247 questions
For questions about the public or private beta phase of a site's progress through the Area 51 site creation process.
246 questions
newly supported on Stack Exchange. Use this tag for remaining bugs.
241 questions
For questions about the CAPTCHA used on Stack Exchange sites to verify that you're a person and not a spam-bot.
236 questions
Questions about the licensing of content on Stack Exchange sites.
235 questions
For questions about how the account merge system works.
226 questions
related to those Stack Exchange sites which are currently in beta phase.
226 questions
For the suggestion of improvements to the phrasing of text shown to users by the Stack Exchange engine.
224 questions
For questions concerning various error messages that users receive throughout the network.
222 questions
For questions dealing with content in foreign languages.
220 questions
Questions may be protected by users with 15,000 reputation or by diamond moderators. Protected questions can only be answered by users with at least 10 reputation (110 if they have the association bon…
219 questions
Refers to the second, non-commercial, generation of Stack Exchange sites created through Area 51.
217 questions
For questions about specific suggested edits that have already been rejected by the community.
215 questions
For questions about the reputation graph listed in your profile summary, or the reputation graph available on your Stack Exchange network profile.
212 questions
For questions involving the "Ignored Tags" specified in a user's Preferences. Questions with these tags are dimmed or removed entirely from question lists.
211 questions
For questions concerning Google, a popular search engine and the main referrer to Stack Exchange sites. For Google as an OpenID provider, use the [google-openid] tag. For questions about Chrome, use t…
210 questions
A metric previously shown on user cards on posts which indicated the percentage of questions for which the user has accepted an answer.
207 questions
The Stack Exchange button, also known as the Stack Exchange™ MultiCollider SuperDropdown™, refers to the button that appears at the top right of all Stack Exchange 2.0 sites.
205 questions
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