One of the mysteries of the English language finally explained.
A person serving (usually unofficially) to promote goodwill between countries, institutions, etc.; now chiefly (frequently with capital initials) a well-known person (especially a celebrity) appointed by a charity or other organization to publicize its activities or promote a specified cause.
1920s; earliest use found in Kokomo (Indiana) Daily Tribune.
In this article we explore how to impress employers with a spot-on CV.