TripAdvisor.com is a travel website that assists customers in gathering travel information, posting reviews and opinions of travel-related content and engaging in interactive travel forums. It is part of the TripAdvisor Media Group, operated by Expedia, Inc.

Expedia, Inc.

Expedia, Inc. is an American company headquartered in Bellevue, Washington that operates several travel brands including Expedia.com, Hotels.com, Hotwire.com, Egencia , TripAdvisor, Expedia Local Expert, Classic Vacations and eLong. Expedia, Inc.’s companies operate more than 90 branded points of...

 TripAdvisor is a pioneer of user-generated content

User-generated content

User generated content covers a range of media content available in a range of modern communications technologies. It entered mainstream usage during 2005 having arisen in web publishing and new media content production circles...

. The website services are free to users, who provide most of the content, and the website is supported by an advertising business model.
TripAdvisor Media Group operates seventeen travel brands including TripAdvisor, Airfarewatchdog, BookingBuddy, Cruise Critic

Cruise Critic

Cruise Critic is a cruise review community website which also has information for cruisers written by editors, news on cruising and a forum. They offer over 225 reviews written by editors and members of the site, and information on cruise ships and over 135 ports of call and includes information...

, Family Vacation Critic, FlipKey

FlipKey

FlipKey is an online vacation rental marketplace. It has an inventory of more than 100,000 rental properties in over 5,000 regions. FlipKey is a Web 2.0 site that puts a strong emphasis on the value of qualified, user-generated reviews of vacation rentals....

, Holiday Lettings, Holiday Watchdog

Holiday Watchdog

Holiday Watchdog is a UK-based travel website which is part of the TripAdvisor Media Group and hosts user-generated hotel reviews.The site primarily focuses on Mediterranean and beach holidays with an emphasis on destinations such as Egypt, Spain, Portugal, Cyprus, Greece and Turkey as well as more...

, Independent Traveler, OneTime, SeatGuru

Seatguru

SeatGuru.com is a website that features aircraft seat maps, seat reviews, and a color-coded system to identify superior and substandard airline seats...

, SmarterTravel, SniqueAway, Travel Library, TravelPod

TravelPod

TravelPod is an online service which allows users to create travel blogs. According to TravelPod, it was the first website to offer this free service when it was founded by Luc Levesque in 1997, pioneering the concept of the travel blog, which is also known as a travelogue or travel journal...

, VirtualTourist and Kuxun.cn.