Whether you've slept with one or not, wearables and sleep tech have gained popularity over the last decade particularly, with a reported one in three Americans now using a ring, watch, wristband, or some other device to track their health data.

But how much can we really learn from these devices? How much can we really rely on them? And how much should we rely on them? And what should everyone know before adding a new piece of tech to their sleep routine? To learn more about the research behind this emerging technology, we've invited neurologist and sleep specialist, Dr. Cathy Goldstein to discuss what actually works.