To Use this find wifi feature you have to go to your facebook and tap to More option and than tap again to Find Wifi, to use this option you have to enable wifi (turn you wifi first), after that you can find the closest available hotspots on map and also you can know about the company hosting thiese wifi. All isp companies have to claim their Wifi Network and link it with their facebook page for the wifi network to be available in the Find Wifi feature in facebook app.
Facebook has launched it’s find wifi feature globally for 2 major mobile os , IOS and Android. This feature help pople who are travelling in new places.
This feature is began testing last year which is available in selected countries and only available for IOS. But now it’s available for all of us who are using android and IOS.
It is mainly be effective when the cellular data have connectivity issues. and when you are travelling internationally and dont’ have cellular data and cannot affoard roaming.