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.
An online social networking service that enables users to send and read short 140-character messages called "tweets".
Regarding the inbox notification area.
For reporting 404-Not Found errors you've encountered on Retrocomputing or discussing the error page itself.
For questions and discussion regarding a specific answer posted on the Retrocomputing site.
For questions and discussion regarding promoting other SE sites here on Retrocomputing.
Regarding answers that have been deleted from the Retrocomputing site.
For the process of identifying and closing questions that have the same possible answers as another question because they are essentially the same.
For general questions and discussion regarding the site's users and user accounts.
Regarding questions that have been closed because they are off-topic or otherwise do not meet the standards of this site.
Regarding the bounty process.
For discussion of the specifics of a particular question asked on Retrocomputing.SE.
the primary way users gain reputation. It also affects the ranking of posts.
Regarding the interaction of Retrocomputing within StackExchange network as a whole
Regarding multiple answers from a user to a single question.
Regarding the use of images on the site.
For questions and discussion regarding expanding the scope of this site.
Regarding the chat room for the site
Regarding questions that have been deleted from the Retrocomputing site.
For questions and discussion about the Retrocomputing Meta site itself.
For questions specific to votes on a post.
For instruction and guidance on closing or migrating questions and the reasons therefor.
For questions regarding user accounts on the Retrocomputing site.
the real time, stateful web chat that's a part of the Retrocomputing site.
For questions about the process of asking questions.
For questions and discussion regarding recent activity on the site.
those users who may be new to the Stack Exchange Q&A format, and generally have a low reputation score, which starts from 1 at the time of registration.
For questions and discussion regarding the profile page that is available for each user.
For questions about the flagging process, how flags are handled, etc
For questions and discussion regarding questions that have no upvoted or accepted answer.
For questions and discussion regarding the quarterly Creative Commons data dumps of all public data in the Stack Exchange network Q&A sites.
For questions and discussion regarding the formatting of posts and comments on the site.
For questions and discussion regarding the *interesting tags* (Now renamed *tag watching*) feature of the site.