What is etiquette? Etiquette is the set of conventional rules of personal behaviour in polite society, usually in the form of an ethical code that delineates the expected and accepted social behaviours that accord with the conventions and norms observed by a society, a social class or a social group. Etiquette is a French word which literary signify a tag or label, and was used in a modern sense around 1750. Etiquette is behaviour that assists survival and has changed and evolved over time. Etiquette can also be defined as a set of rules dealing with exterior form.