Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
If you loved the Game Changers podcast you’ll love this book even more. I wish this book existed when I started doing my lap of the country. If you’re at the start of your career or decades into it, you need to read this book.