> personal messages Exactly. WhatsApp etc are great for exchanging 2 sentence messages with your friends but how do you talk to people outside of your circle?

> personal messages Exactly. WhatsApp etc are great for exchanging 2 sentence messages with your friends but how do you talk to people outside of your circle? If you want to message a company or government dept asking about something how would you do that? Worse still how would you contact a specific person that you didn't already know (say an academic at a university)?