What is what does more than you know mean?

The phrase "more than you know" is often used to express that there is more information or knowledge about a particular topic than what is currently known or understood by a person. It implies that the person may not be aware of the full extent or depth of a situation or concept. The phrase can also be used to suggest that someone is underestimating the value or significance of something. Overall, "more than you know" is a way to emphasize that there is more to a topic than what meets the eye.