is a specific kind of: content, message, subject matter, substance.

is a broader term that covers: buildup | PR, public relations | blurb, endorsement, indorsement | ballyhoo, hoopla, hype, plug | pitch, sales pitch, sales talk | ad, advert, advertisement, advertising, advertizement, advertizing | sales promotion.

is a part of: marketing.

derivation: advertise, advertize, promote, push.