All housework and laundry to do with the children. Which as DH and I work full time is 90% of the housework! We do have a cleaner for 2 hours per week to do bathrooms, deep clean, our ironing.
Typical domestic stuff she does includes changing kids beds, washing, drying, ironing, putting away their clothes, cleaning up common areas, tidying and cleaning toys, cleaning kitchen after cooking for kids, hoovering up play areas (living room), tidying garden at end of day, drying towels after bathtime, tidying bathroom of kids' stuff.
Our nanny is very sweet though, and would never churlishly stick to her duties (ie will unload dishwasher even if some of stuff in there was mine and DHs). She is also great at receiving deliveries, being in for workmen, and helping out with the dog (feeding and sometimes walking him).
Our house is far cleaner, tidier and more organised since I went back to work and our nanny started. She is a godsend - and we treat and pay her as such!