Tripadvisor is an American company that operates online travel agencies, comparison shopping websites, and mobile apps with user-generated content. Its namesake brand, Tripadvisor.com, operates in 40 countries and 20 languages, and features approximately 1 billion reviews and opinions on roughly 8 million establishments. The company's other brands include Bokun.io, Cruise Critic, FlipKey, TheFork, Holiday Lettings, Housetrip, Jetsetter, Singleplatform, Niumba, SeatGuru, and Viator. The company is headquartered in Needham, Massachusetts. In 2023, Tripadvisor earned 25 percent of its revenues from Expedia Group and Booking Holdings and their subsidiaries, primarily for pay-per-click advertising. Wikipedia