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 sandbox questions, which allow people to write answers meant for testing of a particular issue, or a draft for a later answer.
Relating to elements such as menus, bars, and links which help users get around the site.
for questions about Stack Exchange RSS feeds (existing or proposed) and the bot in chat that posts messages when preselected RSS feeds are updated
for questions about the usage of Unicode in posts.
the new block that replaces the "Visit Meta" block that was before used on Stack Exchange sites.
For questions about vandalism, the deliberate act of damaging a post.
Tag watching (formerly known as favorite tags) allows a user to select a set of tags on a Stack Exchange site for highlighting in question lists.
For questions about the 'follow questions and answers' functionality, where you receive updates about a post as if you were the post owner.
Newsletter service, introduced in July 2011, dishing out the top posts of a Stack Exchange site.
For questions about the words and phrases which are blocked from appearing in posts or titles.
Friendly comparison chart showing the reputation gains and losses between users on a site
The global inbox contains information from across the entire network, including hot questions, a list of all sites, an inbox of @responses directed at you, and notifications of badges and ending bount…
Questions about site's functionality issues (bugs, incompatibilities, feature requests) in Internet Explorer.
is for, well, references. Users can refer back to these questions if they need help with basic things.
Every user's account profile has a section showing the recent reviews, revisions, comments, badges, posts (questions and answers), and accepts.
an open standard that allows users to log in to many websites with a single set of third-party credentials.
more or less rants. This tag is not an excuse to freely rant about anything you want without consequence! Please read the tag wiki for details.
For questions about humor on the site
For questions discussing various mathematical conventions and their usage on math.SE.
Questions that discuss the usability of this site by people with disabilities.
Questions related to the "sidebar": the bar that runs down the right side of the page on Stack Exchange sites.