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 about Area 51 itself.
The Technology category includes proposals in subjects like computing, technology, gadgets, and electronics.
The Culture category includes proposals in subjects like language, religion, society, groups, and politics.
350 questions
The Science category includes proposals in subjects like the applied, natural, cognitive, formal, and social sciences.
320 questions
For general user discussions about Area 51. If the discussion can be covered by a different tag, consider using that tag instead.
The Life category includes proposals in subjects like home, family, education, careers, and self-improvement.
247 questions
For discussing the scope of proposals.
The Recreation category includes proposals in subjects like sports, games, and hobbies.
should be used for questions relating to a new feature request for the parent site.
145 questions
describe an error, flaw, failure, or fault on the Area 51 main site.
143 questions
The Arts category includes proposals in subjects like visual art, performance art, humanities, media, literature, and music.
127 questions
Indicates that a feature request has been implemented, a bug has been fixed, or another type of request has been processed.
110 questions
The Professional category includes proposals in subjects like organizations, occupations, and vocations.
For questions related to the commitment accepted by users on proposals.
92 questions
used to request support with any of the Area 51 features.
91 questions
for questions concerning a proposed merging of two existing proposals into one proposal.
75 questions
alert users that this topic is about discussing the definition of the site.
The Business category includes proposals in subjects like management, economics, and markets.
66 questions
collect language-related proposals, i.e. for creating new non-English sites
63 questions
for questions about the private beta phase of a site's life cycle
55 questions
for questions/issues about reputation points.
53 questions
Meta questions about where to ask a specific question within the series of Stack-Exchange sites (when a matching site cannot be found)
52 questions
for questions concerning proposals that have been closed.
helps to identify possible duplicate proposals.
48 questions
46 questions
for discussions about an appropriate name for a proposal.
for discussions relating to the description of a proposal
For questions about the public beta stage when sites first goes public.
38 questions
for questions about proposals that have been deleted.
for questions about closing either questions or proposals
31 questions
For questions about promoting your proposal.
28 questions
for questions about target audiences for your proposal
22 questions
alert users that the topic discussed is part of a proposal that is still in the definition phase.
21 questions
for questions about a launch of a proposal
21 questions
actually due to the existing design of the system and is not considered erroneous behaviour.
20 questions
for questions concerning the planning of a proposal before creating it.