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.
Questions about the behaviour or usage of tags, which are keywords or labels that categorize and group your question with other, similar questions.
used for questions about whether something fits within the defined scope of this Stack Exchange site.
Concerning the pre-defined, site-specific reasons for closure in the off-topic section of the closure dialogue.
For questions about what languages posts, tags, the interface, etc. should be in. – Für Fragen über die Sprache, in der Inhalte, Tags, das Interface, usw. gehalten sind.
Questions about the process of editing, how edits work, and other general inquiries about the edit system.
Frequently asked questions and general guidance for the usage of German Language SE.
Questions about the spelling used in posts and similar. This includes questions on how to handle wrong spelling.
Questions about answers: how to answer, whether specific answers are appropriate, etc.
Questions about the real-time, stateful web chat that is a part of every StackExchange site.