Etiquette is the set of rules and manners that dictate behavior, both in personal and professional settings. Poker etiquette is the collection of norms and rules in and around the poker tables. If you don't know proper poker etiquette, you're bound to make obvious wrong moves and gaffes that can get you into trouble.
Pluribus's self-play produces a strategy for the entire game offline, which we refer to as the blueprint strategy. Then during actual play against opponents, Pluribus improves upon the blueprint strategy by searching for a better strategy in real time for the situations in which it finds itself during the game.