Edward Louis Bernays was an American pioneer in the field of public relations and propaganda, and referred to in his obituary as "the father of public relations". His best-known campaigns include a 1929 effort to promote female smoking by branding cigarettes as feminist "Torches of Freedom", and his work for the United Fruit Company in the 1950s, connected with the CIA-orchestrated overthrow of the democratically elected Guatemalan government in 1954. He worked for dozens of major American corporations, including Procter & Gamble and General Electric, and for government agencies, politicians, and nonprofit organizations. His uncle was psychoanalyst Sigmund Freud.

Public relations (PR) is the practice of managing and disseminating information from an individual or an organization to the public in order to influence their perception. Public relations and publicity differ in that PR is controlled internally, whereas publicity is not controlled and contributed by external parties. Public relations may include an organization or individual gaining exposure to their audiences using topics of public interest and news items that do not require direct payment. The exposure is mostly media-based, and this differentiates it from advertising as a form of marketing communications. Public relations aims to create or obtain coverage for clients for free, also known as earned media, rather than paying for marketing or advertising also known as paid media. But in the early 21st century, advertising is also a part of broader PR activities.