The required information includes sales license, company registration certificate, product quality certification certificate and relevant tax certificates. The reason is that the sale of goods on e-commerce platforms must comply with relevant laws and regulations and platform regulations. Providing these certificates can prove the seller's legal identity and product quality, and ensure that the goods can be successfully put on the shelves for sale. At the same time, this is also an important measure to protect the legitimate rights and interests of consumers and the commercial order of the platform. If the seller does not provide these supporting documents, it may be restricted from sales or punished by the platform. In addition to the above supporting documents, sellers are also required to provide clear pictures, detailed descriptions, after-sales service and other information of the goods to provide consumers with a better purchasing experience. At the same time, it is recommended that sellers understand the relevant supply channels and market demand before selling, continuously optimize products and services, and improve sales levels and word-of-mouth evaluations.