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.

The question you're asking is designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus.
indicates that your question is about site policies. Usually, new proposals for policies or questions about existing ones will have this tag
233 questions
For questions about code golf challenges and/or submissions. DO NOT post code golf challenges themselves as questions here; those belong on the main site or in the Sandbox if you want to get feedback …
230 questions
For questions regarding answers posted to challenges. This tag is not for questions about a specific answer, but for answers in general
179 questions
Indicates that the question is asking for clarification or help around a site feature, rule or custom, such as how something works, or why specific rules are in place.
You have an idea for a new feature, or for a change to the existing functionality. Make sure you provide justification for why your suggestion should be implemented
158 questions
Tags are keywords or labels that categorize and group your question with other, similar questions.
Indicates that the report has been resolved through the implementation of a feature or the fixing of a bug.
Indicates you've found an erroneous or unexpected behaviour in the system that needs to be fixed.
82 questions
Indicates that the feature request will not be implemented, or that a bug will not be fixed at present time.
79 questions
For questions about scoring a challenge or how to score a particular language
79 questions
Indicates you are proposing new rules or asking for clarification on other ones.
78 questions
A sandbox is a place where you can post proposed challenges for others to review.
75 questions
For meta questions pertaining to asking other questions, on main or meta.
75 questions
Requests for help with, or discussion of, a specific question on CGCC.
67 questions
For questions about challenges on the main site
For questions about using the Stack-exchange chat system
Indicates that the question is about features and discussions that specifically relate to new users on the site.
50 questions
Questions about the "close as duplicate" mechanism.
44 questions
For questions that relate to the reasons behind closing a challenge/challenges
42 questions
For questions that relate to the quality of challenges on the main site
36 questions
Each month, we select a "language of the month" - a programming language that isn't as well used on the site - in order to promote usage of that language. This tag is for questions relating to the Lan…
Questions about what sort of questions are appropriate for CGCC.
35 questions
For questions about up/down-voting posts. Not to be confused with close, reopen, deletion, or election votes.
35 questions
Indicates you are either proposing or asking for clarification on winning criteria.
33 questions
Questions about moderation of this site, including the site moderation tools, policies on moderation and specific moderating actions taken by users
For questions about editing - both when and how editing is done on either main or meta sites
31 questions
These questions are the most frequently asked and answered questions on Meta and the first place to look for answers to your questions
29 questions
Questions and discussion related to CGCC Meta itself, not just CGCC. Questions with this tag should specifically relate to Meta and not to the main site
29 questions
For clarification of rules that apply to challenges if not mentioned by the author
28 questions
General questions about questions that have been closed because they do not meet the criteria defined in the FAQ.
27 questions
Reputation is the system used by Stack Exchange to measure the values of a user's contribution to the site. As users gain more reputation, they are trusted with more privileges that help the users mod…
26 questions
Indicates that the reported behavior is intentional and not subject to change
25 questions
Flagging is a way for any user with 15 reputation or more to alert the site moderators about problematic posts. Use this tag on questions that directly relate to the flagging system and flags as a who…
25 questions
Questions about the site's diamond (♦) moderators, along with their powers and actions
23 questions