I keep seeing posts about "my arrows shoot nock left" or "nock right". Does this mean the arrows are stuck in the target with the nock left (or right) of the arrow point? Or do they mean that the arrows are grouping to the left or right of where they're being aimed?
I'm asking this because I've also read that many target materials will 'bias' how an arrow sticks in the target, and give the archer false information.
Can someone please explain this stuff more clearly?