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.
46 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.
31 questions
For questions about the process of editing, how edits work, and other general inquiries about the edit system.
27 questions
held to choose moderators for Database Administrators and other non-beta Stack Exchange sites.
for questions about tag synonyms (how they work, who can create them, proposing a new synonym, and so on).
21 questions
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.
the process of migrating off-topic questions from a Stack Exchange site to another.
19 questions
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…
15 questions
14 questions
13 questions
13 questions
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.
12 questions
12 questions
11 questions
for instructions and guidance on closing or migrating questions, and the reasons for those closures.
11 questions
the real time, stateful web chat that's a part of every Stack Exchange site.
10 questions
For questions about the flagging process, how flags are handled, etc.
For questions about the process and etiquette of creating new tags.
9 questions
8 questions
7 questions
7 questions
7 questions
7 questions
Requests for new entries for the FAQ repository on this site should use this tag.
6 questions