Train tickets are documents or digital passes that allow passengers to travel on a train. They can be purchased at ticket counters, online, or through mobile apps. Train tickets usually specify the departure and arrival stations, travel date, and time. Prices may vary based on factors like distance, class of service, and how far in advance the ticket is bought. There are different types of train tickets, including one-way, round-trip, and multi-ride options. Some tickets may offer discounts for children, seniors, or students. Passengers must present their tickets when boarding the train and may need to show them again during the journey.