I. Introduction
Online customer reviews, which provided by consumers who have purchased a product previously. These have become a major information source for consumers and marketers know the quality of products. Customer reviews on products or services that companies publish on their web sites are widely read now. Customers are putting less trust in corporate marketing messages and becoming more influenced by recommendations from other people reviews. E-commerce companies need to have a long-term client relationship strategy to keep customer satisfied and improve services. Manufacturers need discover customer opinions about company products, features, services.