Hand luggage are things that you can take with you on board the plane. For example, a handbag, outerwear, etc.
The carry-on baggage allowance depends on the selected fare. On all service class fares "Economy" the passenger is provided with 1 place on the luggage rack, with dimensions 55*40*20 cm and weighing no more than 10 kg.
For passengers of the service class "Business" there are 2 places of hand luggage, the total weight of which should not exceed 15 kg.
Read more about hand luggage here.