This week Vaughn talks with Emily Vacher from Facebook who leads a programme named Amber Alerts - a missing child alert system.
In New Zealand, the alert sends critical information to anyone on Facebook who is in the local search area.
The details that appear on Facebook are an image of the missing child, their age, and the details of the car or area they were last seen in.
The alert will come through in the middle of a users feed with a picture and a short description... but always the same information. After this, you can choose to 'learn more' and it will give the user more details about the case.
"When kids go missing, people automatically turn to facebook..."
For all this and more, listen to the full interview with Emily above.
Sunday Social with Vaughn Davis, 7pm - 8pm on RadioLIVE and streaming live to the Rova app on Android and iPhone.