Train tickets are documents that grant passengers the right to travel on a specific train route, date, and time. They can be purchased online, at stations, or through authorized agents, with options for one-way, round-trip, or multi-segment journeys. Tickets display details like departure/arrival times, seat numbers, and fare class (e.g., economy or first-class). Many systems offer e-tickets or mobile passes for convenience. Prices vary based on distance, demand, and booking timing, with discounts often available for advance purchases or special groups (students, seniors). Some tickets are flexible (refundable/changeable), while others are non-refundable. Valid tickets must be presented for inspection during travel to avoid penalties.