They are angles measured in degrees. That's what the
o symbol means.
Good description of each and where they are measured here: https://explorationoutfitters.com/pages/caster-camber-toe-explained#:~:text=Camber %26 Toe Explained-,Caster%2C Camber %26 Toe Explained,slope of the steering axis.&text=This ensures good stability%2C helps,as viewed from the front.