PRODUCT DIFFERENTIATION 

Product differentiation describes a situation in which there is a single product being manufactured by several suppliers, and the product of each supplier is basically the same.  However, the suppliers try to create differences between their own product and the products of their rivals.  It can be achieved through quality of service, after sales service, delivery dates, performance, reliability, branding, packaging, advertising or in some cases the differences may be more in the minds of the customers rather than real differences, but a successful advertising can create a belief that a service or product is better than others and thus enable one firm to sell more and at higher price than its competitors.