What are the advantages and disadvantages of marketing research?

advantages: 1. To study needs,wants and expectations of the customers. 2. To find out reactions of customers to products of the company. 3. To evaluate company's sales promotion measures for suitable adjustment and improvements. 4. To study current marketing problems and opportunities foir suitable follow up. 5. To suggest introduction of new products,modification of existing products. 6.To study marketing competition,channel of distribution and pricing for suitable changes if necessary. 7. To find methods for making the product popular and raising its goodwill and marketing reputation.