If an ad is to be successful, it must be so arresting, persuasive, clever and maybe even fun, that it pretty much tricks the audience into internalizing its oh-so-important message. The reader is captivated by its artistry and led happily — a bit unknowingly — to its message. Yet it is the business-like strategy — the armature of a clear message — on which the whole clever enterprise rests. The reader, viewer or listener should never be aware of the creaking machinery of message — that is, until he or she has taken it as gospel.
Here, for your reading pleasure, are chapter and verse.