Nielsen is a leading global information and measurement company that enables companies to understand consumers and consumer behaviour. Nielsen measures and monitors what consumers watch (programming, advertising) and what consumers buy (categories, brands, products) on a global and local basis. The company has a presence in approximately 100 countries spread across Africa, Asia, Australia, Europe, the Middle East, North America, South America, and Russia. Employs approximately 40,000 people worldwide. Total revenues were $5.7 billion in 2013.