Tags
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.
OBSOLETE: For questions about a new navigation system, tested as an opt-in feature on Stack Overflow, Meta Stack Overflow and Meta Stack Exchange from 2015 to 2017.
Stack Exchange's own OpenID provider, used for "log in with Stack Exchange" and potentially used for logging into other OpenID consumers.
For questions about old questions.
Reverts a post to the previous edit version, if any exists.
Questions about how Markdown is processed and rendered by the system.
Tag filters (AKA the Stack Exchange™ GlobalTag MegaBlender™), as seen at https://stackexchange.com/filters.
If you don't want to see everything, you use a filter. This tag is for any questions about filtering in Stack Exchange sites.
Popups are interactive dialogs that are shown within the current page. They are distinct from tool tips, which are short, descriptive pieces of text relating to the element under the mouse pointer.
A placeholder for old site proposal discussions. If you have an idea for a new Stack Exchange site, you should propose it on Area 51.
a subset of privileges available to moderators and users with high reputation
The "Private Beta" period of a new Stack Exchange site is a limited time period when a brand new site is tested to ensure it is viable to become a public site on the network.
For questions about how close a person is to earning a particular badge, and about the badge trackers on the profile page.
For questions about comments that were deleted, deleted comments in general, or the comment deletion process
Relating to elements such as menus, bars, and links which help users get around the site.
For questions that address the quality of questions and how it should affect their treatment.
Link only answers are answers that are barely more than a link to another page.
View that shows preview text and titles of questions based on tag, activity or search result
For questions about providing feedback to (or receiving it from) other users, moderators, the development team, or anyone else participating in Stack Exchange sites. For the feedback (up- & downvotes)…
The notification bar refers to the messages that appear in a banner on the top of the page until you dismiss them. These banners are used to welcome new users, inform users of new privileges they've g…
The undisclosed algorithm through which all new questions are passed to determine if they can be posted on a Stack Exchange site.
Questions that involve systematizing, suggesting, defending and recommending concepts of right and wrong conduct on Stack Exchange
Of and relating to the "side bar", or the bar that runs down the right side of the page on Stack Exchange sites.
For questions about the "Linked" sidebar on questions, a selection of other questions that the question links to, or other questions that link to that one. This tag can also be used for the linked que…
These posts are your quick guide to the what, how, where, and when of the Stack Exchange network.
Split difference, showing the raw up and downvotes on a post. Cracked open at 1000 reputation, except here on Meta.SE, where it's 100.
Keyboard shortcuts let you perform various site functions (if you have enabled them in your profile settings). Use this tag for questions related to keyboard shortcuts, such as how to enable and get s…
referring to the process of identifying and dealing with answers that are exact duplicates of another answer.
For questions about the Winter Bash (or holiday hats) to celebrate the end of the year 2013.
for questions related to the +100 reputation award when you reach +200 reputation on any site.
When viewing a question, the "Related Questions" block is shown on the right side of the page and provides a system-generated list of questions similar to the current one.
For questions relating to the Stack Exchange 'Tour' page, formerly known as the 'About page'.
For questions about the minimum and/or maximum of the number of characters you can enter into various slots.
For reporting 404 Not Found errors you've encountered on Stack Exchange sites or discussing the error page itself.
The aspect of attribution in the context of the license used by Stack Exchange, CC BY-SA 4.0 - https://creativecommons.org/licenses/by-sa/4.0/
Tag wiki excerpts are the most visible portion of tag wikis. They're shown when hovering over a tag, on the Tags page, and in the autocomplete suggestions when adding tags. They're intended to be a sh…
For questions (and discussions, etc.) on Meta Stack Exchange about post notices. A post notice is a relatively brief banner message that appears above a post. Post notices typically either explain why…