Viagogo is an online ticket marketplace that allows users to buy and sell tickets for various events, including concerts, sports, and theater performances. Founded in 2006, it operates globally, providing a platform for fans to access tickets that may be sold out or hard to find through traditional outlets. The platform connects sellers, who may have extra tickets, with buyers looking for specific events. Viagogo charges fees for transactions, and users can browse events by location, date, or category. However, it's important for buyers to review the terms and conditions, as ticket prices can vary significantly.