Facebook is cracking down on user reviews to prevent people from leaving fake feedback on business pages. The company has updated its Community Feedback policy to address this widespread issue. Last year, Facebook removed 16,000 groups that were selling and buying fake reviews of various products and services.

source https://gadgets360.com/social-networking/news/facebook-update-policy-fake-reviews-business-page-3088842#rss-gadgets-all