When communication with people on Facebook, using audio messages saves a lot of time and misunderstandings. it leads to more sales conversions too.
I'm sure you know what it's like, you get tired of writing messages and sometimes your words get misinterpreted so its much easier to use audio.
After that you can introduce video chat or Skype because the personal touch goes a long way to building relationships quickly. Simple videos like the one above can help your communication skills too.
Yet it's surprising how many people shy away from using the free marketing tools they have under their noses.
If you're not doing this yet, I suggest you give it a try.... you might amaze yourself with the results you get in terms of more sales and better conversions.