Early on Twitter was seen as a status sharing service by lots of users. But if early employee Noah Glass is to be believed, it was, from the very beginning, also meant to be about conversation.
“All is Fair in Love and Twitter” narrates the early conversation between Glass and Jack Dorsey that would lead to the creation of Twitter:
As he listened to Dorsey talk, Glass would later recall, he stared out the window, thinking about his failing marriage and how alone he felt. Then he had an epiphany. This status thing wasn’t just about sharing what kind of music you were listening to or where you were, he thought. It could be a conversation. It wasn’t about reporting; it was about connecting. There could be a real business in that. He would certainly like such a service: his nights alone in his apartment, alone in his office, alone in his car, could feel less alone with a steady stream of conversation percolating online. The two brainstormed for a while longer, and as Dorsey staggered out of the car to go home, Glass said, “Let’s talk to Ev and the others about it tomorrow.” (post)
Conversation brings its own problems. See Streams Don’t Merge
Of course, with conversation comes the Two Minutes Twitter Hate