This covers the review/rating ecosystem itself — fake reviews, review-bombing coordination, bot-generated ratings, and asking users to leave a specific star rating in exchange for anything of value.
Frequently triggered by an in-app prompt that explicitly steers users toward leaving a 5-star review only if they're happy (and silently redirects unhappy users to a feedback form instead), which Google treats as manipulating the public rating.
"Your app's rating prompt selectively filters user sentiment before directing users to the Play Store, which violates the User Ratings, Reviews, and Installs policy."