Nielsen Media Research is a provider of television audience measurement services, and is the leading such provider in the United States and Canada. Nielsen serves national and local customers including television networks, affiliates independent stations, syndicators, cable networks, cable systems, advertisers and their agencies. Through its core ratings business, the Company estimates television audience size and demographics and reports this and related information to a diverse customer base on a subscription basis. Data is collected by electronic metering systems and written diaries. The Company offers services in four principal areas: national ratings services, local ratings services, U.S. Hispanic ratings services and Canadian ratings services. Nielsen also offers services that enable advertisers to manage their media spending by linking television ratings to commercial occurrences and that provide Internet and Web-page usage analysis.
(Source: 10-K) – less–ZoomInfo