Tips
Selling starts only when you have product. Marketing starts before there is a product. Marketing is the homework that the company does to figure out what people need and what company should make. Marketing determines how to launch, price, distribution, and promote the product or service offering in the market place.
Marketing also decides when to change and to drop the offering (so as well as sales in term off on field of selling)
With all that said,marketing is not a short term selling effort but a long term investment effort.when marketing is done well, it occurs before the company makes any product or enters any market,and it continues longer after the sales.