system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does Google photos separate photos into such specific categories without them being labeled manually.
gpt
With machine learning. A computer program has looked at many many images that _were_ labeled, and it learned from them what sorts of labels to put on other photos. It learned by looking at an image that people had labeled but not looking at the label, guessing a label and then comparing the result with the label given by a human. Then it made a note of whether it was right or wrong. Doing this many times with many different images it learned to label automatically.