At present, there are two kinds of insurance, one is commercial insurance and the other is social insurance.
Social insurance is compulsory and the state participates. The five insurances and one gold mentioned in our country include endowment insurance, medical insurance, industrial injury insurance, maternity insurance, unemployment insurance and housing accumulation fund.
These insurances are implemented by the state through legislation, and social workers can enjoy basic insurance. The guarantee he provides can only be the most basic living guarantee. Moreover, they are all paid by enterprises (employers) and individual employees, among which maternity insurance and unemployment insurance are all borne by enterprises (employers). Individuals don't have to pay fees, so social insurance is equivalent to the welfare of a country.
Commercial insurance is purchased by individuals according to their own needs, and the insurance premiums are all borne by individuals, which is equivalent to the supplement of social insurance.
For example, in the current social insurance, the maximum reimbursement amount for medical insurance is 3,000 yuan, and the part exceeding 3,000 yuan will be borne by individuals. If a person falls ill and spends 1000 yuan, the other 7,000 yuan can't be reimbursed by social insurance, because the social insurance can only reimburse 3,000 yuan at most, but if you buy commercial insurance as supplementary insurance, the remaining 7,000 yuan can also be reimbursed, thus reducing the corresponding burden. Of course, this is only a small part. I'm glad to answer it for you.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.