To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
This stuff was, and still is, gold. Basic commonsense, easy to remember when you stop and think, amazingly effective when used, but hard as heck to keep using in the moment. And so, thanks to Amazon, I can keep trying . . .