Restaurant chain P.F. Chang’s spent $25,000 to advertise a Lunar New Year promotion this winter, and the results from mobile Twitter users were “staggering.” The brand displayed sponsored tweets promoting dining rewards to Twitter users searching for terms such as “Chinese New Year,” on their mobile phones or their personal computers. In the first four days of the campaign, approximately 1 million people clicked through or engaged with the posts via retweet or reply; of those, roughly 70% did so from mobile devices. Read →