Some of our audience are sure to know this, but for those who don’t, emoji is the Japanese expression for what we commonly know as “smileys”. While emoji started off life in Japanese email and web communications, their use has been adopted by much of the world at large, including Apple and Android smartphone operating systems and many websites and web services. Here is a realtime visual tracker that shows counts and frequency of particular emoji as used by Twitter. The most-used emoji, reassuringly, is the heart symbol (or at least was at the time of this writing). Click on the graphic or go here to see the tracking in action.