Review systems are platforms or processes that allow users to evaluate and provide feedback on products, services, or experiences. These systems often include ratings, written comments, and sometimes multimedia content, helping potential customers make informed decisions. Common examples of review systems include websites like Yelp, TripAdvisor, and Amazon. Businesses use review systems to gain insights into customer satisfaction and improve their offerings. Positive reviews can enhance a company's reputation, while negative feedback can highlight areas needing improvement. Overall, review systems play a crucial role in shaping consumer behavior and influencing market trends.