Facebook engineers claim DeepFace is 97.25% accurate, reducing margins of error by more than 25%. Facebook uses facial recognition software to match people in photos your friends upload with the other billions of images on Facebooks servers in which you might appear. If Facebook determines someone in a photo looks like you, it will encourage your friend to tag the photo with your name. Facebook doesnt give you any way of disabling its facial recognition technology, but what you can do is ask Facebook not to use it.”]
Source: https://grahamcluley.com/facebook-facial-recognition/