A habit of speech and conversation whereby a questioner asks a very unspecific question of a questionee, or series of such questions, leading up to the actual question which the questioner would like the questionee to answer. A waste of conversational bandwidth, be it spoken or digital.
Rules on when it is or isn't appropriate to comment on someone else's manners or behavior. In other words, rules of etiquette for discussion of rules of etiquette, or meta etiquette (metaquette).
Alice: Did you notice how Chad was being super-polite to Dana, but he barely even said hi to Eric?
Bob: Yes, but since Chad is standing right next to you, I'm going to have to question your metaquette skills.