According to Baidu Education, public relations companies are social intermediaries. Social intermediary organizations refer to professional organizations with intermediary, media and coordination functions in various relationships or activities between government and market, government and society, and government and market subjects. They are non-profit and non-governmental social organizations. As a professional intermediary, public relations companies play the role of communication and coordination between enterprises and the government, and between enterprises and the public, helping the two sides to establish contacts and handle various transactional work. Therefore, public relations companies can be regarded as social intermediaries.

Public relations company, that is, public relations company, is composed of professional public relations experts and various public relations people. It is an information-based, knowledgeable, communicative and organized service organization that provides public relations consultation for social organizations or undertakes public relations activities for customers.