Etiquette
Etiquette (/ˈɛtᵻkɛt/ or /ˈɛtᵻkɪt/, French: [e.ti.kɛt]) is a code of behavior that delineates expectations for social behavior according to contemporary conventional norms within a society, social class, or group.
The French word étiquette, literally signifying a tag or label, was used in a modern sense in English around 1750. Etiquette has changed and evolved over the years.