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 about tags: notes placed on a question to indicate its topic.
For questions about the scope of the Arts & Crafts site, what types of questions are permitted and whether a particular query would be on-topic.
Whether a specific question or general topic is able to be discussed on Arts & Crafts.
For questions about chat, the site's "third place" (after main site and meta) where informal discussions can be had and questions asked that would be off-topic on the main site.