It used to be that Facebook Live would broadcast to the whole world by default. But in a move that brings the platform closer to traditional broadcasting, Facebook Live can now be restricted by a whole host of different demographics. 

The implications this has for live sport broadcasting, as an example, are huge. Twitter already have an agreement in place to broadcast some NFL matches - expect to see Facebook follow suit.

As advertisers, this is a potentially exciting time. Imagine your highly targeted ads appearing in a live football match.