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.
when examining what is on-topic or off-topic, and why (i.e the scope of the site).
For the post that deals with the evaluation of the site, typically used for "Progress Report" which are usually posted every year.
Questions about how to promote Hinduism Stack Exchange, in order to attract more users.
For questions about what sources to cite, and how to cite them.
currently under consideration, or needs further investigation.
keywords or labels which categorize a question with other, similar questions.