A more thorough explanation:

A housekeeper is someone who lives in and takes care of a house. This means that they are responsible for keeping the house clean, organized, and in good condition. They may also be responsible for cooking meals, doing laundry, and other household tasks.

• My aunt works as a housekeeper for a wealthy family. She lives in their mansion and takes care of everything from cleaning to cooking.
• When I was in college, I worked as a housekeeper for a bed and breakfast. I lived on the property and was responsible for cleaning the rooms and common areas.

These examples illustrate how a housekeeper is someone who not only cleans and maintains a house, but also lives in it. They are responsible for the day-to-day upkeep of the house and may have additional responsibilities depending on their specific job.