Quoting Digiday's Jan. 7th posting:
"According to a December Engagement Labs ranking, Tiffany’s Twitter game has made it the top luxury brand on the platform. The study, which used Engagement Labs’ eValue social metrics system to compare competitors, found that Tiffany’s Twitter sees high engagement from followers, and the account is the most responsive, replying to customers’ questions and complaints. The ranking also cited Tiffany’s #WillYou hashtag, used in reference to its engagement rings, as representative of the brand’s most engaging tweets."
Link to Digiday.com