This paper reviews the factors that drive web service to be free for client. Some of web service stand pure and still free and other adopt advertisement banner. However, we trying to understand both and based on which element they run advertisement. Besides, how advertisement assist web as dual advantage for business and client. Illustrate the relation between free web service and advertisement in four specific factors, and how that affect industrial and future product. However, those factors try to indicate to right decision based on analysis and evaluation of data collected. Factors are two types. Some of them have direct effect and other have indirect influence. Developer highlighted those based on information and data analysis seeking better result to serve market. Furthermore, third party might play some rules beside, factors such as traditional and culture based on different region. Many journals and articles observed during research, which they are relevant to the topic, and due to limited to range of source, which serve the aim of research within certain interest. The model goal to understand free web service, and which kind of factor improve the relation between industry and customer through advertisement tool. In additional, web service decide the range of advertising based on the factor. This paper show how web service is provide service to client without cost, and the web service expects from the client to share their interested. Based on the feedback, advertisement delivers industrial product to customer.