How is this different from any other type of marketing? "We will use our special|professional|proprietary|psychic knowledge of the market in order to make your

How is this different from any other type of marketing? "We will use our special|professional|proprietary|psychic knowledge of the market in order to make your product sell better" On the one hand marketing is critical for any business, they do need to sell things after all. On the other, the marketing group is really good at selling things, most importantly themselves, that is, selling how good they are at selling things.