What is something new you learned?

The question posed above seems easy enough. No big deal. Right?
However, I would always sweat bullets when my boss unfailingly asked that during our weekly 1:1s. He would sit there and wait patiently until I came up with an answer.
The question made me acutely aware of what I learned every week - so I could have an intelligent answer. It also made my learning mindset go on overdrive.
I moved beyond just a passive consumer of information (most of which were meaningless garbage) to actual knowledge that helped me grow.


What is something new you learned recently?