While reading the answers to this question, I noticed this thing:
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I would like to propose one of these things on another stack I am active on. However, I'm not sure what the terminology is (what do I call it?) or how it works (does it appear through votes by the community or does a mod apply it?).
The CSS refers to it as a "post notice" - something which I have never before heard of on this site.
So ... what is it?