Review markup rules

Google's review snippet guidelines make pages using LocalBusiness or any other Organization markup ineligible for star review features when the reviewed entity controls the reviews about itself, including reviews shown on its own site through an embedded third-party widget such as Google or Facebook reviews. Marked-up review content must be readily visible on the page, ratings must be sourced directly from users rather than compiled by editors, and an aggregate must supply the average rating for the snippet to display.