“Our thoughts and prayers are with everybody involved," Trump tweeted after the YouTube HQ shooting.
Twitter is a powerhouse in Japan, where linguistic differences mean a 140-character limit is more than enough space to express yourself.
So far, CEO Jack Dorsey has not been able to deliver on his promise to get Twitter back on track.
The new appointment comes after four top executives left Twitter.
For those who don’t spend all day on Twitter or get why it’s useful, here’s an attempt to reveal the “magic” of the platform.
The microblogging platform is struggling to attract users and may ditch its 140-character limit.