refer to "advertising or publicity" is very modern and was first recorded in 1925. It may be a contraction of a related term, sales promotion, which is one element in the larger set of tools used in marketing communications. In turn, it is often further abbreviated to 'promo' as a verb or a noun, as in "Barbara Stanwyck cancelled out her Chicago movie promo date here, announced for mid-month"

The terms, promotion and marketing communications can be used synonymously, but in practice, the latter