Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
Very easy to use and it had a great selection of restaurants! I had this emailed to my brother so he got it right away, no waiting by the mailbox to arrive. If you don’t get a thank you, tell them to check their spam folder!!!