Recommender systems are altering from novelties used by a small number of online sites, to grave business tools that are reshaping the world of E-commerce. Numerous sites are already using it to help their customers for finding good products to purchase. In this paper it presents an explanation of how recommender systems help E-commerce sites to increase sales, and analyze business patterns to developer. Based on the system business developer is helpful to build the product according to the customer likes. It create patterns using recommender systems, including the interfaces they present to customers, the technologies used to create the recommendations, and the inputs they need from customers. It concludes with ideas for new applications with recommender systems for business to customer interaction. © 2014 IEEE.