Social work is work done to help society. A social worker is an individual who represents the social well-being of society. This sub-group does not have a defined employment track, they may be privately (hospital), independently, or publicly (government) employed that gives adequate welfare and helps people who cannot help themselves including physically disabled people, person with other disabilities, people addicted to alcohol, and people with addictions to drugs. This person helps the disadvantaged person acquire a normal life (job, home, money, etc.)
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Social work Facts for Kids. Kiddle Encyclopedia.