TripAdvisor
TripAdvisor, Inc. is an American travel and restaurant website company providing hotel and restaurant reviews, accommodation bookings and other travel-related content. It also includes interactive travel forums.
TripAdvisor was an early adopter of user-generated content. The website services are free to users, who provide most of the content, and the website is supported by a hotel booking facility and an advertising business model.
TripAdvisor, headquartered in Needham, Massachusetts, is the largest travel site in the world, with more than 315 million members and over 500 million reviews and opinions of hotels, restaurants, attractions and other travel-related businesses. TripAdvisor Media Group operates 25 travel brands including TripAdvisor, Airfarewatchdog, BookingBuddy, Citymaps, Cruise Critic, Family Vacation Critic, FlipKey, GateGuru, Holiday Lettings, Holiday Watchdog, Independent Traveler, Jetsetter, lafourchette, Niumba, OneTime, SeatGuru, SmarterTravel, Tingo, TravelPod, Tripbod, VacationHomeRentals, Viator, and VirtualTourist. TripAdvisor operates websites internationally, in such places as Austria, Australia, Belgium, Brazil, Canada, China, Denmark, France, Germany, Greece, India, Indonesia, Ireland, Italy, Japan, Mexico, The Netherlands, Norway, Poland, Portugal, Russia, Serbia, Singapore, Spain, Sweden, Thailand, Turkey, the U.K., and the U.S.
Source: Wikipedia
