I looked for posts on this topic and only found some that are 2+ years old without resolution.  A Team’s Description can only be viewed by clicking on “More” then “View team profile.”  This makes it minimally useful.

Apparently the Description formerly appeared on the right when a team was selected (along with members, pins, etc.) but a UI change did away with this.  It would be helpful to restore this.  Alternately, it would be useful to make Description appear when hovering over a Team (with the mouse pointer).