These recommender systems are used in retail, entertainment, social networking and more. Recommender systems seem attractive to sellers because they do not have to pay the marketplace for receiving recommendations, while traditional advertising is costly. For example, sellers should provide accurate product descriptions, which can help recommender systems provide better matching between products and consumers.”“Consumers should embrace recommender systems. “Consumers should embrace recommender systems,” he said. “The business and societal value of recommender systems cannot be assessed properly unless economic issues surrounding them are examined,” Chen said.