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 questions about the various user interface and email elements used to notify users of events on the site.
for questions about the built-in search functionality of this site powered by elasticsearch.
Tag for questions involving the banning of users.
For questions about posts, deleted by their owners, through automatic processes, or by moderators.
For questions about the images used in your own posts.
for questions about suspected user spam, the spam flag or combating spam as a community.
about the top 7 question list on the Stack Exchange blog.
for questions related to converting answers to comments.
Tweeting the "interesting" and "hot" things to Twitter via the integration of bots.
For questions about internet trolls and trolling on Stack Exchange sites.
A programming tool or software development tool is a computer program that software developers use to create, debug, maintain, or otherwise support other programs and applications.
for questions or issues surrounding login to this site.
The Stack Exchange Data Explorer (SEDE) allows you to create and run queries against copies of the databases of popular Stack Exchange sites.
For discussion about the explicitly commercial advertising that appears on this site (if any).
For questions about real world stackexchange / code-review branded items.
Every user's account profile has a section showing the recent reviews, revisions, comments, badges, posts (questions and answers), and accepts.
Appending improvements involves adding improved code to a question, whether or not it came from an answer. This is disallowed on Code Review as it disrupts the review process as specified in the Help…
For questions concerning Google, a popular search engine and the main referrer to Stack Exchange sites.
Ceiling and floor of the number of characters you can enter into various slots.
Questions relating to the suggestion or request for one or more new badges.
the new block that replaces the "Visit Meta" block that was before used on Stack Exchange sites.
an open standard that allows users to log in to many websites with a single set of third-party credentials.