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.
community-vetted advertisements that will show up on the main site, in the right sidebar. The purpose of this question is the vetting process. Images of the advertisements …
if your question is about community bulletin. If you want a question to appear in the community bulletin, featured tag should be used instead.
questions related to data about the website, most likely from data.SE
question about the design of the site
designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus.
Any two or more questions which cover the same topics and/details and can be answered by one of the existing questions.
used by moderators (for EOL notices) or by anyone for discussions about handling posts about EOL versions of Ubuntu.