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.

designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus.
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keywords or labels that categorize and group your question with other, similar questions.
Questions and discussions about the scope of android.stackexchange.com.
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For questions regarding the creation, modification, or removal of tag synonyms.
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You have an idea for a new feature, or for a change to the existing functionality.
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For questions about, well, questions: how to ask, whether specific questions are appropriate, and so forth.
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A site cleanup project to improve tags on questions.
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for requests to replace one tag with another existing tag. It also applies to requests that one tag should be merged into another, or simply abandoned.
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For questions/discussion about promoting Android Stack Exchange.
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feature. Not for questions about changing tag synonyms.
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For questions which focus on a particular question (either from here on Meta or the main site), rather than discussing a "class" of questions generally.
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Discussion about what should be included in the parent site's FAQ page.
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For questions about the user interface elements and web pages that make up this site.
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