WPP is the world's largest communications services group, with billings of $74 billion and revenues of over $19 billion. Through its operating companies, the group provides a comprehensive range of advertising and marketing services, including advertising and media investment management; data investment management; public relations and public affairs; branding and identity; healthcare communications; digital, e-commerce and shopper marketing, and specialist communications. The company employs over 200,000 people (including associates and investments) in over 3,000 offices worldwide.