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.
For questions designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus.
What's on topic and what's not. How should we define or change our scope as we find topics that are currently off topic but shouldn't be, and vice versa.
Which existing pairs of tags should be merged, which not yet existing tags should be created as synonyms, policies regarding synonyms.
Why were certain questions closed? Which questions ought to be closed? What to do with questions that have been closed.
Questions specifically about the answers rather than the QA-chain as a whole.
Questions about how moderation works on our site, about how to moderate, about particular moderation events, etc.
The set of reasons available to give when closing a question, including which to use when and proposed new reasons.
The look, feel, style, layout, and overall design of our site, especially as it progresses from the beta to the launched phase.
About the actual editing of posts, both the questions and their answers.
For questions about what counts as a duplicate, identification of duplicates, their implications and how to reduce their incidence. Note the tag [exact-duplicates] may be more appropriate for some que…
About questions on the main site that have no answers at all.
Questions about all the qualities that go toward making a question on our site a good one.
Questions about community elections for Travel Stack Exchange moderators.
A user can cast a ballot to close a question for a number of reasons like it's a duplicate of another question or off-topic.
Questions about the comments that users and moderators can attach to questions and answers.
About migrating questions to or from other Stack Exchange network sights and Travel Stack Exchange.
Events scheduled for the site and the chat room, and ideas for future such events.
Questions about questions related more to expatriates and immigration than they are related to travel. We consider them off-topic here but the subject comes up regularly.
Questions about immigration and expatriates are a specific recurrent class of off-topic questions on our site. What should we do about them?
Questions about more or less official site policies on how we should use and behave on the site.
For questions about the site's bounty system as described at: http://travel.stackexchange.com/help/bounty
Indicates that a submitted issue rather erroneous behaviour is actually due to the existing design of the system.
For questions about the sites badge awards, as described at: http://travel.stackexchange.com/help/badges
Questions about how and when to flag questions, answers, and comments for moderator attention and review.
Meta questions about the wikis generally and "full" wikis specifically that all good tags ought to have. Note that tag wiki excerpts have their own tag.
For questions about what constitutes abuse of the system by way of self-promotion, advertising and failure to disclose affiliation and how to react to that abuse. Although when used by the general pub…