Ever wondering how Facebook can conveniently pop-up a "sponsored" or "suggested" post that punctiliously meet your interest? Or as soon as your group photo got uploaded to Facebook, your friends inside the photo get recognized by FB instantly? (you can see those while sliding your mouse to the face of your friend)
Trust me those aren't hocus-pocus spells taught in Hogwarts nor alien technology from distant-space. It's an AI that FB employed to sort out billions of FB active user's profile called convolutional neural network (CNN). CNN is one of the many machine learning types that excels in deep learning. It does  visual and audio recognition so well that it can deliver medical diagnosis accurately, rendering doctor obsolete. (And I might put out of work because these artificially intelligent robots can eventually do all my microscopy screening, biochemical test