It just cross references emails with public hack dumps. I have 7 listed breaches on sites with the email I've had forever. Those accounts didn't compromise my

It just cross references emails with public hack dumps. I have 7 listed breaches on sites with the email I've had forever. Those accounts didn't compromise my opsec in any way but it is interesting to see. The average person using the net for a while has some on there. It is an interesting tool. If someone is trying to hack you they might start there and see what your old passwords looked like.