Viator is an online marketplace for tours, activities and experiences that helps travelers find and book things to do in destinations worldwide. The site aggregates listings from local operators and larger experience providers, showing photos, itineraries, prices and traveler reviews to help compare options. Many listings offer instant confirmation and mobile vouchers, letting travelers book last-minute activities and present tickets on a phone.

As a TripAdvisor-owned brand, Viator emphasizes user reviews and searchable filters (duration, price, accessibility, and small-group options) so shoppers can narrow hundreds of choices quickly. Booking pages typically list what’s included, meeting instructions and cancellation terms — policies vary by supplier, and Viator marks listings with flexible-cancellation options when available. Payments are taken at booking through major credit cards and common online methods, and the site supports multi-language pages and local-currency pricing in many markets.

Practical strengths are breadth and convenience: Viator covers museums, guided city tours, day trips, transfers, food experiences, and special-access visits across a large number of destinations. That breadth means quality varies by supplier — the platform exposes reviews to help spot reliable operators, but occasional last-minute changes or supplier cancellations still occur. For shoppers who prioritize choice, quick confirmation and an easy mobile voucher experience, Viator is a solid place to compare and book activities; those wanting tightly curated, uniform standards should expect variability between individual listings.