Nielsen announced on Wednesday that it’s expanding Twitter TV Ratings to include Facebook as well, and is renaming it to Social Content Ratings. What this means is that the company will now factor social media shares on both Facebook and Twitter into its ratings for American television programs, with Instagram expected to be added in the near future. Nielsen has been notoriously slow to adapt to the changes in media consumption that have been brought about by the Internet, and this the latest in a string of moves by the company to change that.