Answer:
Consumers will not buy enough of a firm's products unless the firm undertakes large scale persuasion and promotional efforts
Explanation:
The selling concept proposes that, customers will not buy much of a firm's products unless they are persuaded and induced to buy such products via means of sales promotion, marketing and advertising.
The concept emphasizes upon the need for the firms to promote their products via advertising and other means of sales promotion so as to create a want which did not pre exist and thereby draw the attention of customers towards different products the firm produces.
This approach is more suited towards less sought after products by consumers, for which a want has to be created. For instance, life insurance policy.
The approach is applicable to those large firms who produce huge output and thus to sell the excessive output, they have to resort to promotional means.