Nielsen Holdings plc is a performance management company. The Company provides to clients an understanding of what consumers watch and what they buy and how those choices intersect. The Company's segments include what consumers buy (Buy), consisting principally of market research information and analytical services, and what consumers watch and listen to (Watch), consisting principally of television, radio, online and mobile audience and advertising measurement services and corresponding analytics. The Buy segment provides measurement services, which include its core tracking and scan data (primarily transactional measurement data and consumer behavior information), and analytical services to businesses in the consumer packaged goods industry. Its Watch data is used by its media clients to understand their audiences, establish the value of their advertising inventory and maximize the value of their content, and by its advertising clients to plan and optimize their spending.