>>56618632I'm largely referring to environmental mechanics and other miscellaneous knowledge: activating Turn-based Mode, using stealth, cover/obscuring line of sight, difficult terrain and creating hazards, shoving for easy kills, knowing when to group/split, throwing potions, understanding the essence of action economy so your turns are more than Attack -> End, etc.
These are things that would require a degree of trial and error to fully realize unless you read about it somehwhere.