The document discusses the concept of hygiene in human life. It defines hygiene as keeping the human body and environment clean. There are two main types of hygiene: environmental hygiene, which provides a healthy environment through practices like proper food sanitation; and personal hygiene, which involves cleaning and grooming the body through actions such as bathing and brushing. Maintaining good hygiene is important as it helps avoid smells and diseases, prevents food poisoning, and keeps the environment clean.