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 topics regarding only a specific language or set of related languages.
A specific question refers to a particular and individual question on the site. This tag is used to query the community on the specifics of a particular question asked on the main site or the meta sit…
for questions about the entire network of Q&A sites that make up the Stack Exchange network.
10 questions
runnable inline code samples. Currently HTML, CSS, and JavaScript are supported. Use this tag for bug reports, feature requests, and discussions explicitly relevant to these snippet…
5 questions
Questions about sizes and other quantities of Stack Exchange sites, e.g. number of questions, GB/day transferred, etc.
5 questions
8 questions
0 questions
3 questions
0 questions
currently under consideration, or needs further investigation.
5 questions
Users without full edit privileges can suggest edits to posts and tag wikis.
25 questions
when you are experiencing issues when using the site.
For questions about real world stackexchange / code-review branded items.
1 question
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.
28 questions
For questions about the syntax highlighting performed inside code blocks on Stack Exchange sites.
18 questions
0 questions
keywords or labels that categorize and group your question with other, similar questions.
for questions about tag synonyms (how they work, who can create them, etc). Use [synonym-request] for tag synonym requests.
11 questions
an editable page that briefly summarizes the topic of the tag and that may provide links to existing questions that are often useful to many people.
9 questions
for questions referring to a non-Stack Exchange controlled entity.
22 questions
0 questions
for issues of what is allowable or desirable in question titles.
26 questions
A programming tool or software development tool is a computer program that software developers use to create, debug, maintain, or otherwise support other programs and applications.
2 questions
about the top 7 question list on the Stack Exchange blog.
3 questions
For questions about internet trolls and trolling on Stack Exchange sites.
2 questions
Tweeting the "interesting" and "hot" things to Twitter via the integration of bots.
2 questions
those questions which have no up-voted answers.
17 questions
used when asking questions about undeleting questions/answers.
4 questions
for questions specific to upvotes, the community's way of telling peers that their content was clear and helpful. Up-votes on the meta sites may have different meanings.
6 questions
Refers to user accounts either generically, or across the network.
7 questions
The user interface elements and web pages that make up this site.
15 questions
User retention refers to keeping a user who has come to our site, coming back again and again.
4 questions
for general questions about users and user accounts.
4 questions