Check-in processes are procedures used by organizations, such as hotels, airlines, and events, to register guests or participants upon arrival. This typically involves verifying identification, confirming reservations, and collecting necessary information. The goal is to ensure a smooth transition for individuals entering a facility or service. In the context of airlines, check-in can occur online or at the airport. Passengers provide their details, select seats, and receive boarding passes. For hotels, guests may check in at the front desk, where staff assist with room assignments and provide keys. Efficient check-in processes enhance customer satisfaction and operational efficiency.