After sales service is the most important part of after-sales. After sales service has become an important factor for enterprises to maintain or expand their market share. The quality of after-sales service can affect the satisfaction of consumers. At the time of purchase, the relevant provisions such as warranty and after-sales service of goods can help customers get rid of doubts and vacillations and make up their minds to purchase goods. High quality after-sales service can be regarded as the product of brand economy. In the society of fierce market competition, with the improvement of consumers' awareness of rights protection and the change of consumption concept, consumers are no longer only concerned about the products themselves. Under the condition that the quality and performance of similar products are similar, they are more willing to choose these companies with high-quality after-sales service.

Objectively speaking, high-quality after-sales service is the product of brand economy, and the after-sales service of famous brand products is often better than that of non brand products. The price of famous brand products is generally higher than that of miscellaneous brands. On the one hand, it is based on the product cost and quality, and on the other hand, the after-sales service cost has been taken into account in the sales strategy of famous brand products.

After sales service certification has brought benefits to enterprises. Through the establishment, implementation and evaluation of the service certification system, the service awareness and initiative of enterprise personnel can be enhanced, and the service quality level of enterprises can be improved as a whole, so as to ultimately enhance customer loyalty and satisfaction, and realize the improvement of enterprise economic benefits. After sales service evaluation refers to the judgment of commodities in a certain range, including specifications, resources, quantity, time, system, characteristics, process, activities and effects. The evaluation of after-sales service must be based on the requirements of the whole pre-sales and after-sales service system, the authenticity publicity of product characteristics and basic information before sales, and the after-sales commitment and service to customers. Service Star certification is never just a simple oral after-sales service commitment, but the facilities established in 4S stores, cooperative online stores, business districts, airports and other places, as well as the personnel and resources configured and improved by enterprises to realize after-sales service; At the same time, it has proved that the enterprise has the leading service in the whole industry, won the recognition of consumers and the market, continuously improved the service, improved the service system, established a good reputation for after-sales service, continuously improved the service quality, and enhanced the continuous income of the service profit chain.