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.

Use for questions on meta about the A that the user who posted the Q deemed best met their need. This tag is for discussing issues related to accepted answers, not indicating that a question has an ac…
3 questions
For questions about linking accounts for the same user across the Stack Exchange family. For merging accounts (more than one for the same user with Web Applications) see [merge-accounts].
2 questions
1 question
for questions about answers: how to answer, whether specific answers are appropriate, and so forth.
10 questions
for questions specifically about the process of asking questions on this site.
awarded to encourage and incentivize positive community actions within the site.
9 questions
Questions pertaining to the beta phase of our Stack Exchange site, before it graduated.
4 questions
For questions about the characters or character combinations blocked from appearing in posts and about tags that may not be created.
5 questions
for questions about the official blog of Web Applications. The blog no longer exists as of March, 2017
6 questions
Use for questions about the star to the left of questions with the pop up "Click to mark as favorite question" (that toggles) used to mark posts considered important or interesting to the user. For to…
2 questions
a way to get additional attention for a question by offering some of your own reputation for great answers.
6 questions
Indicates you've found an erroneous or unexpected behavior in the system that needs to be fixed.
102 questions
the process whereby certain actions (see https://meta.stackexchange.com/a/48579) cause an existing Question to be added as a recent entry to the "active" view of the Questions page. Such …
1 question
For questions about canonical questions, i.e. those often used or referred to.
4 questions
For questions about the CAPTCHA used on Web Applications to verify that you're a person and not a spam-bot.
2 questions
Questions about the chat room and what takes place there.
6 questions
For coordinating projects to help clean up the main site.
34 questions
for general questions about questions that have been closed because they are off-topic or otherwise do not meet the criteria defined in the FAQ.
21 questions
for instructions and guidance on closing or migrating questions, and the reasons for those closures.
14 questions
small addendum to each question or answer, intentionally limited in size and formatting, and are meant to be temporary.
10 questions
How best to use those posts, both questions and answers, that are marked as editable by everybody and thus have no owner.
6 questions
For questions about competitions on the site (originally relevant around the time Web Applications graduated), so this is unlikely to be of use on new questions.
8 questions
0 questions
The Stack Exchange Data Explorer (SEDE), located at data.stackexchange.com, allows you to create and run queries against copies of the databases of popular Stack Exchange sites to investigate trends o…
1 question
use for any questions specifically concerning answers that have been deleted.
4 questions
Refers to all questions deleted from Web Applications. The tag "specific-question" should also be used when referencing a specific question that has been deleted.
7 questions
Questions about the design of the site, whether it is a bug, feature-request or otherwise.
51 questions
designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus.
As a string of characters that identifies a realm of authority within a Domain Naming System (DNS) this tag was mainly of relevance around the time Web Applications graduated and is unlikely to be of …
4 questions
2 questions
For questions about the process of editing, how edits work, and other general inquiries about the edit system.
15 questions
held to choose moderators for Stack Overflow and non-Beta Stack Exchange sites.
16 questions
Questions that involves systematizing, suggesting, defending and recommending concepts of right and wrong conduct on Web Apps Stack Exchange
2 questions
Questions regarding etiquette and proper behavior toward other users, both on and off Web Applications.
1 question
Questions flagged as duplicate, and/or reasons to do so.
12 questions