Probably in charge of anything to do with the customer (food and bev, reception and service) and all the practical stuff like maintenance, utlilities, H&S, cleaning, and laundry. In fact everything but the businesss managment, marketing and the finance.
As Maydup answer, but also excludes HR (recruitment and training), excludes sales, and normally excludes property side (property management and maintenance, capital works and development).
Would that be the same job that a Housekeeper in a hotel or large house would have done? I can't even organise one house with one human and two little Tigers.
No wolf, a much higher up job. I'd expect DO to organise the staff, oversee conferences, buy furnishings, etc. - or delegate those jobs down to others on their team.