“Are you okay?” is a new Facebook feature that is used to communicate to your contacts that all is well in the event of natural disasters or other events involving deaths and injuries. “Are you okay?” notifies you when an emergency occurs in the area where you are located.
Asked if he is actually alright you can answer confirming that everything is OK, and in this case, Facebook will generate a status update on your diary, or indicate that you are in another place far from where there was an emergency . With over one billion active users, Facebook is a giant instant information, and this feature could prove very useful. Don’t you think?