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.
a flag that can be applied to answers (and questions) which lowers the barrier for editing and prevents any rep gain/loss from voting.
For questions about changing site name from Programmers.
the most frequently asked and answered questions on Meta.
Cleanup Initiative, a program to systematically destroy bad, honeypot tags.
use for any questions related to deleted answers specifically.
The user profile page, which contains a list of all the questions, answers, and an audit trail of the user's activity on the site
questions asking for resources - books, links, tutorials, articles, tools, libraries etc