I can't even tell what this is, from one of the founders of Twitter. But there's some sort of idea here:
Broadly speaking, Medium is a blogging platform, meaning it’s a place for people to write and read posts. And Mr. Williams, as its C.E.O., hopes that it will allow thoughtful, longer-form writing to flourish. Mr. Williams frankly acknowledges that the medium of Medium is not new. In fact, he says he’s reaching back to the once-du jour notion of blogging because, in the frenzy to build social communications tools, something has been left behind: rationality.