What does the American immigration guarantee fee mean?

Economic security. American immigration law stipulates that American citizens or permanent residents must provide financial guarantee when applying for immigration for their relatives, which is the legal basis for American relatives to need financial guarantee. The purpose of economic security is to ensure that the beneficiaries who immigrate to the United States by family reunion will not receive or enjoy unemployment benefits, relief funds, subsidies and other welfare benefits from the federal, state or local governments for some reason after entering the United States, thus becoming a burden to the public.