Multiscope Tutorial

Hi, I’m starting to feel that mixes are not anywhere near as good as they should be. I starting a bit of a re-learning exercise with my mixing and mastering of my tracks and the tools available to me. I’ve never really used any of the tools in Multiscope given that I’ve never fully understood what to do with it. I understand that it displays different things from my mix but never quite sure what is good and what is bad (I understand this subject is subjective) and how to fix it in the mix? Can anyone recommend any ‘simple/basis’ reading on this subject or possibly a tutorial that demonstrates a worked example?