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 related to converting answers to comments.
Cross-posting refers to posting the same question on multiple websites.
about the quarterly creative commons data dumps of all public data in the Stack Exchange network Q&A sites.
The Stack Exchange Data Explorer (SEDE) allows you to create and run queries against copies of the databases of popular Stack Exchange sites.
For questions about posts, deleted by their owners, through automatic processes, or by moderators.
the tag to use for any questions related to deleted answers specifically.
refers to all questions deleted from Stack Exchange sites. The tag "specific-question" should also be used when referencing a specific question that has been deleted.
"Design" refers to front-end elements, such as page layout, coloring conventions, etc.
for questions specific to down-votes, the community's way of telling peers that their content can be improved. Down-votes on meta site have different meanings.
referring to the process of identifying and closing questions that are duplicates of another question.
a core, fundamental Stack Exchange value; we allow editing by registered and unregistered users (if peer reviewed).
enter Stack Exchange posts, which supports a live preview of Markdown syntax.
held to choose moderators for graduated sites.
the norms and standards of accepted behavior and politeness in our community. The golden rule is "Think before you post."
referring to the process of identifying and closing questions that are exact duplicates of another question.
For questions about the flagging process, how flags are handled, etc.
fun! Use this tag for anything that suggests adding a new layer of gamification to the site.
For questions concerning Google, a popular search engine and the main referrer to Stack Exchange sites.
For issues regarding the help center of Stack Exchange.
Relating to the discussion and controversy around questions that are explicitly stated as, presumed, or suspected to be homework questions (i.e. those given to a student in a formal course of study).
HTML links, generally those created within the network on questions, answers, or the site itself.
For questions about the images used in your own posts.
a set of tags that can be marked by a user. The questions that have favorite tags will be highlighted, and can be monitored using Tag Sets.
for questions regarding the process of reviewing improved code over time.
Legal issues, including copyright, licensing, patents, and trademarks
Questions about the licensing of content on Stack Exchange sites.
For questions regarding locked posts and locking functionality. Diamond moderators can lock a question or answer.