The Certificate of Excellence accounts for the quality, quantity and recency of reviews submitted by travelers on TripAdvisor over a 12-month period. To qualify, a place must maintain an overall TripAdvisor bubble rating of at least four out of five, have a minimum number of reviews and must have been listed on TripAdvisor for at least 12 months.
See more at: https://www.tripadvisor.com/TripAdvisorInsights/n2628/travelers-have-spoken-2016-certificate-excellence#sthash.YPN3N3Tq.dpuf
Know more about Regina Rica and what the prilgrims says? https://www.tripadvisor.com.ph/Attraction_Review-g2336235-d4040573-Reviews-Regina_Rica-Tanay_Rizal_Province_Calabarzon_Region_Luzon.html