* [flags](/questions/tagged/flags "show questions tagged 'flags'") has 82 questions, and [moderator-flag](/questions/tagged/moderator-flag "show questions tagged 'moderator-flag'") is a synonym to it.

Wiki excerpt:

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> Users with sufficient reputation can flag posts that have quality problems which they are unable to address themselves, thereby bringing them to the attention of the site's moderators.
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* [flagging](/questions/tagged/flagging "show questions tagged 'flagging'") has 570 questions, and [flag](/questions/tagged/flag "show questions tagged 'flag'") is a synonym to it.

Wiki excerpt:

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> Flagging is the process of bringing a post to a community moderator's attention for any reason.
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I don't see an obvious difference in meaning between these tags. Is one supposed to refer to *flags themselves*, while the other refers to the *act of flagging*? Is that really a difference that needs to be made distinct?

If there is no meaningful difference, I suggest we merge them all into the most popular tag ([flagging](/questions/tagged/flagging "show questions tagged 'flagging'")).