Interpublic is a group of commonly owned, but autonomous advertising and communications services companies. As one of the world's leading organisations of advertising agencies and marketing services, Interpublic operates in four broad areas, covering activities such as advertising and media management, direct marketing and customer relationship management, public relations, sales promotion, event marketing, online marketing, corporate and brand identity and healthcare marketing, market research, brand consultancy and database management, sports and entertainment marketing, corporate meetings and events, retail marketing and other marketing and business services.