"A lot of people come to Twitter and they don’t actually see an app or a service, they see what kind of looks like a public square. And they have the same sort of expectations of a public square. And that is what we have to make sure that we get right. And also, make sure that everyone feels safe to participate in that public square.”

-Jack Dorsey

https://www.wired.com/story/jack-dorsey-twitters-role-free-s...

I am not endorsing his statement but Twitter's CEO apparently considers it as a town square.