What does a housekeeping service company do?

Housekeepers help with housework.

Job responsibilities include home cooking and catering, home cleaning and hygiene, household chores (laundry and ironing, paying miscellaneous fees, etc.), home care (medical care, sickness care, maternal and child care, babysitting and confinement care, Taking care of the elderly, taking care of patients, accompanying and chatting, home health care, etc.), serving employers, etc.