Need To Know How WMC Processes Metadata

Hello lovely people, I had a quick question regarding WMC and I figured this was probably the best place to start looking at this point in time. Can anyone point me to guides or references to how WMC processes and handles metadata? Particularly when it comes to TV Show Seasons and Movie covers. Anything I’ve found on the internet hasn’t worked, e.g. my movie covers don’t display and tv shows aren’t grouped by season. I just want to know how the program handles manual editing of these parameters and am looking for any resources I can get. Thank you!