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.
Ask for multiple tags to be merged.
should be used as a GENERAL tag for posts about questions and answers in general and not specifically one or the other.
to be used when requesting a deletion (but not blacklisting) of a tag on either the main or meta Ask Ubuntu site.
For questions about the Winter Bash (or holiday hats) to celebrate the end of the year.