The purpose of this research is to analyze and find out how influential web-based information systems are on the promotion of a trading product. The methods used to conduct this research were descriptive and interview methods. The results of this study could be concluded that the web-based information system influenced the promotion carried out by a company. Web-based information systems are currently widely used to search for product information, although there is an Android-based information system that is also quite familiar among the people to search for product information but cannot replace the web-based information system. Therefore, web-based information systems can influence the promotion of a product because many consumers search for product information through web-based information systems.