Train seat availability refers to the number of seats open for booking on a particular train for a specific date and class. You can check train seat availability online through the IRCTC portal or railway apps. It shows you real-time data on available seats, waitlist status, and quotas. Checking seat availability helps passengers plan trips better and choose the most convenient trains. Whether you need AC, sleeper, or general class, railway reservation seat availability ensures you get the right spot. Always verify train availability in advance to avoid last-minute booking stress or ticket unavailability.