The New York State Workers' Compensation Board defines a "domestic worker" as someone who is employed and paid by to perform duties within their employer's private household. Examples of domestic workers include maids, cooks, housekeepers, laundry workers and butlers.
According to Wikipedia, some domestic workers live within their employer's household. A domestic worker's tasks may consist of providing care for children and elderly dependents, cleaning, cooking, laundry service, personal shopping and other household tasks.
Based on national surveys and censuses, the International Labour Organization estimates the number of domestic workers to be around 53 million. The ILO also states that 83 percent of domestic workers are women, and many are migrant workers.