Facebook announced new optional tools with new face recognition technology which are now rolling out to alert you when someone uploaded your photo to Facebook. Facebook will notify you if youre in a photo and are part of the audience for that post, even though if you havent been tagged. Facebook introducing these new features in most places, except in Canada and the EU where Facebook doesn’t currently offer face recognition. The tool is also notifying you when its face recognition tech recognizes them in pictures even if they’re not tagged. It will start sending out notifications when someone else uploads users photos as profile pictures.”]
Source: https://gbhackers.com/facebook-facial-recognition-technology/