There is a famous saying: "The product is not easy to operate." That makes sense. The purpose of operation is to make products live better and longer. Living better is to improve the usage data of products through activities and promotion; To live longer is to improve the function and usability of products through data analysis and user behavior research, so as to obtain a longer product cycle. However, not all products use this rule. Because Shanda's famous saying is aimed at online game products, and then spread a little, entertainment products. These products can achieve good results through operation without any problems. However, for tool products, such as payment tools, if there are problems in product design, such as user's use process, interaction design, browser compatibility, etc., then even the best operation can't save the product. Only by solving the usability and usability problems of the product itself can we consider the supporting role of the operation on the product.