What does mod duty mean?

This word refers to the position of chief duty manager of a hotel.

Responsible for the supervision and management of the daily affairs of the hotel. The main duties of MOD duty include: patrolling all areas of the hotel, checking the operation of facilities and equipment, and ensuring that all services of the hotel meet the standards; Handle guest complaints and emergencies, solve problems in time to ensure guest satisfaction; Monitor employee performance to ensure service quality and efficiency.