Public relations involves creating mutual understanding between an organization and its publics, managing reputation, and obtaining favorable publicity to build a good corporate image. Key public relations functions include press relations, product publicity, public affairs, lobbying, and investor relations. Public relations tools encompass written materials, audiovisual content, identity materials, digital marketing, and public service activities. Public relations officers plan programs, write and edit materials, conduct media and community relations, handle corporate identity production, and research and evaluate public perceptions.