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.
Questions applying "The 7 Essential Meta Questions of Every Beta" to politics.stackexchange. How do we want to define the "Politics" site?
a link which either points to nothing or points to irrelevant contents
questions relating to the tour page introducing new users to the Politics Stack Exchange site.