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.
You have an idea for a new feature, or for a change to the existing functionality.
For questions about the behavior or usage of tags, which are keywords or labels that categorize and group your question with other, similar questions.
a plan or drawing produced to show the look and function or workings of a program, database, stored procedure, or other object before it is created or made.
For questions about the process of editing, how edits work, and other general inquiries about the edit system.
for questions about tag synonyms (how they work, who can create them, proposing a new synonym, and so on).
the process of migrating off-topic questions from a Stack Exchange site to another.
held to choose moderators for Database Administrators and other non-beta Stack Exchange sites.
For requests to replace one tag with another existing tag. It also applies to requests that one tag should be merged into another, or simply abandoned.
temporary "Post-It" notes left on a question or answer. They can be up-voted (but not down-voted) and flagged, but do not generate reputation. There's no revision history, and when they a…
Besides gaining reputation with your questions and answers, you receive badges for being especially helpful. Badges appear on your profile page, flair, and your posts.
the real time, stateful web chat that's a part of every Stack Exchange site.
for instructions and guidance on closing or migrating questions, and the reasons for those closures.
For questions about the process and etiquette of creating new tags.