公益广告是为了促进公共利益,唤起人们对社会问题的关心,并呼吁人们以实际行动来改善或解决这些问题。刊登公益广告的广告主有三种:一为由公益团体或社会团体等非营利机构出面刊登,二为企业出面刊登,三为由非营利机构号召,企业集资资助。其中,企业出面刊登公益广 Public service advertisements are intended to promote public interests, arouse people’s concern for social issues, and urge people to take practical actions to improve or solve these problems. There are three kinds of advertisers who publish PSAs: one is for non-profit organizations such as public interest groups or social organizations to publish, the other is for companies to publish, and the other is for non-profit organizations to call for fund-raising. Among them, companies have published public welfare publications