WPP plc, (Wire and Plastic Products) is a British multinational advertising and public relations company with its main management office in London, England, and its executive office in Dublin, Ireland. It is the world's largest advertising company by revenues, and employs around 179,000 people in 3,000 offices across 111 countries. It owns a number of advertising, public relations and market research networks, including Millward Brown, Grey, Burson-Marsteller, Hill & Knowlton, JWT, Ogilvy & Mather, TNS, Young & Rubicam and Cohn & Wolfe.