I do not feel particularly comfortable about this, but digging further into learning about the Facebook facial recognition and what good it could do. I've come to understand that it is for the privacy and safety of its users The newly introduced privacy feature can tell whether someone has uploaded your photo to Facebook’s network. Which will in turn fish out tons of fake facebook accounts.
If you have been using Facebook at least since the first day of this week till now, you must've seen a notification on your news feed similar to the one shown here. It is Facebook's way of informing their users about this new change that is coming to the platform.
According to the Mark Zuckerberg owned number social media network in the world, analyzing people’s faces and storing them has its benefits. For instance, people can know if someone has uploaded their picture onto the network, regardless of whether they’re tagged in it or not.
Another advantage is that Facebook could tell you whether a stranger is using your photo as their profile picture and help visually impaired users identify people in photographs.
Read more at
https://www.techvillz.com/2018/03/how-to-turn-off-facebook-facial-recognition-on-app-and-pc.html