The University of North Carolina at Pembroke states that internal and external publics are components of public relations. Internal publics are individuals employed by an agency, while external publics are people and organizations outside of the company that are doing business with an agency.
Publics are customers, current and potential employees, investors, vendors, suppliers, media, government and opinion leaders who are important audiences for an organization. Public relations seeks to develop and sustain relationships between a company and its publics. Public relations uses activities, products and communications to form a positive relationship between the organization and the internal and external publics. Event management, publicity and publication design are three common methods used in public relations.