Publicis Groupe is a French multinational advertising, public relations, and digital transformation giant, one of the world's largest communications groups, known for its "Power of One" model connecting creative, media, data, tech, and health services for major global brands like Disney and McDonald's, operating across 100+ countries with a focus on innovation and digital integration. Founded in 1926 by Marcel Bleustein-Blanchet, it's famous for its creative work and technological prowess, aiming to help clients win in the digital age.