Often I hear people use the term “marketing” when they mean “sales” and vice versa. A Melbourne advertising professional succinctly defines the terms this way:
Marketing tells a story that spreads.
Sales overcomes the natural resistance to say yes.
Link: The difference between marketing and sales
So, If your “marketing” campaign isn’t yielding the “sales” you projected, it’s probably because you need to rewrite your campaign story and retool your pitch.