Train classes refer to the different categories of seating and services available on a train. These classes can vary by country and train service but typically include options like first class, business class, and economy class. First class usually offers more spacious seating, better amenities, and higher levels of service, while economy class is more budget-friendly with basic seating and services. In addition to seating arrangements, train classes may also include sleeper cars for overnight journeys, providing passengers with private sleeping accommodations. Some trains offer luxury classes that feature gourmet dining and exclusive lounges, enhancing the travel experience for those willing to pay a premium.