Marketing is not only much broader than selling, it is not a specialiSed activity at all. It encompasses the entire business. It is the whole business seen from the point of view of its final result, that is, from the customer's point of view. Marketing is not only much broader than selling, it is not a specialiSed activity at all. It encompasses the entire business. It is the whole business seen from the point of view of its final result, that is, from the customer's point of view.