Royale Ohoka

I have a 2-dimensional Mesh with quadrilateral cells. It says my Maximum Skewness is 0.54 which is a good value from any literature I have seen.

Attached is a snippet of my Skewness values and Aspect Ratio. Are these all acceptable?

What is a poly cell?

In relation to the domain, I do have my mesh broken into 6 sections or so following a particular tutorial.