A user review refers to a review written by a user or consumer for a product or a service based on her experience as a user of the reviewed product.
Popular sources for consumer reviews are e-commerce sites like Amazon or Zappos, and social media sites like TripAdvisor and Yelp.
E-commerce sites often have consumer reviews for products and sellers separately. Usually, consumer reviews are in the form of several lines of texts accompanied by a numerical rating.