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This is an administrative category, used for maintenance of the Wikipedia project. It is not part of the encyclopedia and contains non-article pages, or groups articles by status rather than subject. Do not include this category in content categories (except for eponymous maintenance categories).

This is a tracking category. It builds and maintains a list of pages primarily for the sake of the list itself. They are not part of the encyclopedia's categorization scheme.

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• These categories can be used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience.
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This category combines all Wikipedia articles needing clarification from May 2021 (2021-05) to enable us to work through the backlog more systematically. It is a member of Category:Wikipedia articles needing clarification.
To add an article to this category add {{Definition needed|date=May 2021}},{{Definition|date=May 2021}},{{Confusing|date=May 2021}}, {{Clarify span|date=May 2021}}, {{Clarify|date=May 2021}} or {{Ambiguous|date=May 2021}} to the article. If you omit the date a bot will add it for you at some point.