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.
The reviews describe this story very well. I thought it was going to be just a lighthearted story but was pleasantly surprised to find there was quite a lot to reflect on as the story progressed and especially as it wrapped up. Relatable characters and situations, good story, well-written, wise.