Ideological and moral education and guidance for teenagers. Public service advertisement is an important way for the country to guide teenagers and even the public to carry out ideological and moral education through modern media. As a relatively advanced and scientific carrier of culture and education, it has a very important influence on the moral understanding, the choice of social ethics and the ideological and moral quality of China teenagers. At present, in the process of social development of teenagers in China, public service advertisements conform to the law of teenagers' growth. By purifying their spiritual growth homes, improving their moral growth environment, and guiding young people to establish a correct world outlook, outlook on life and values in the process of growth and development.