如何令顧客肯翻單、增加購買量和介紹顧客?

customer service is important in the market. There are key element to increase customer volume.
first of all, it is bulld good relationship between customer and staff such as staff performance is the best when customer will buy the product.
Second, it is sales of service 售後服務 in aim to increase cusotmer volume.
Third, it is good " word of mouth". cusotmer buy more and more purchase