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.
"The Dupehammer" refers to the ability of tag gold badge owners to unilaterally close and reopen duplicates which were asked in tags of which they have a golden badge.
for questions and discussions about restricting types of questions, question topics, and specific text within a question's title or body.
Awesome magical equines
should be used for questions that provide an explicit guideline on how to use the ELU or ELU meta sites. If the meta discussion deems the guideline unhelpful the tag should be deleted.
Questions related to the usability of English Language & Usage Stack Exchange by people with disabilities.
Questions about the user-specified image in user cards