One oversight most players have is how to pick their target when in a match against multiple opponents. This is very important in some of the most chaotic battles found within the game, ones where you could quickly need to focus on another fighter at any given moment. Honestly, knowing how to change your target could be the small difference that secures victory for yourself.
Controls To Change Targets
JoyCons: D-Pad Up (JoyCon L)
Single Joy Con: ZL/ZR
JoyCon Grip / Switch / Pro Controller: Left D-Pad Up