With the two social networks included at launch, and with plans to integrate Instagram at a later date, the service will change its name to Social Content Ratings. 

The solution will measure aggregate-level programme-related conversation on Facebook and Twitter, including posts shared with friends and family, with followers, and publicly. The expanded service should be available in the first half of 2016, in all markets where Twitter TV Ratings are currently available (Australia, Italy, Mexico and US). 

"The development of Social Content Ratings reflects Nielsen’s commitment to continually adapt our services to meet the needs of the industry and is part of Nielsen’s ongoing effort to evolve our measurement to reflect the total audience across screens and platforms," said Sean Casey, president, Nielsen Social.

"Nielsen Social measurement is evolving to provide a comprehensive, standardised picture of how consumers are responding to programme content through social media, wherever and whenever."