Twitter and Nielsen Ad Ratings measurement campaign goes global
Twitter has partnered with Nielsen Ad Ratings to measure campaigns in 24 countries, including Australia, Brazil, Hong Kong, the US and the UK. Nielsen's digital ratings are based on similar metrics to those used to measure TV advertising and provide advertisers with data such as audience verification, age and gender demographics and gross ratings. Twitter has been using Nielsen's ratings service in the US since May last year.

The mobile measurement agreement between Twitter and Nielsen is going global, as the two companies announced Monday that Nielsen Digital Ad Ratings will be used to track Twitter mobile campaigns in 23 new markets.