To qualify for the Certificate of Excellence, businesses must maintain an overall rating of four or higher, out of a possible five, as reviewed by travellers on TripAdvisor. Additional criteria include the volume of reviews received within the last 12 months. "TripAdvisor is pleased to honor exceptional businesses for consistent excellence, as reviewed by travellers on the site," said Christine Petersen, President, TripAdvisor for Business. "The Certificate of Excellence Award gives highly rated establishments around the world the recognition they deserve. From exceptional accommodations in Beijing to remarkable restaurants in Boston, we want to applaud these businesses for offering TripAdvisor travelers a great customer experience."