5 Conclusion
Researchers believe that when customers use a service or a product, they gain a great deal of knowledge and experience. This knowledge has become an important resource for organizations and obtaining that has become a competitive advantage in enterprises especially in the age of information in which technologies such as web and computer networks have been developed, the organization environment has been more dynamic and with the advent of e-commerce the importance of competitive advantage has increased and ensured better performance than the competitors and led to profitability in the short term, and survival and growth in the long term for the organization. This paper focuses on the use of customer knowledge management in gaining organizations' competitive advantage in E-commerce. Results of simple and multiple linear regression tests indicate that applying customer knowledge management causes to gain competitive advantage for organizations in e-commerce. The result of regression test shows 67.7% of changes in the competitive advantage in e-commerce are affected by costumer knowledge management. Customer knowledge management provides opportunities for organizations to provide valuable information and support to maintain and retain new and existing products and services. This often provides considerable competitive advantage for organization in E-commerce. Findings show CKM includes knowledge from customer, knowledge for customer and knowledge about customer that by recording and spreading customers' knowledge, and its use, application and management lead to enhancing the quality of products and services and their pace of providing the products and services as well as the acquisition of reasonable prices and thus increasing customer satisfaction and loyalty, and reducing complaints, it ultimately leads to the achievement of the organizations that deal with e-commerce and e-business to a sustains a competitive advantage in electronic commerce. Therefore, it is recommended that organizations and companies that deal with e-commerce and ebusiness provide the customer with opportunity to change from a passive mode information sources and passive recipients of products and services and turn into powerful knowledge partners. By careful planning of managers and planners the companies and organizations are to design organizational strategies for managing and applying customer knowledge in order to achieve a sustainable competitive advantage in e-commerce. Through a more efficient and effective use of customer knowledge they can produce and offer products and services with higher quality and in the shortest possible time and in accordance with the costumers' wishes and opinions in order to achieve satisfaction, loyalty and maintain this competitive advantage in e-commerce.