NBA2K21 has made some pretty big changes to how shooting works. If you're coming off playing previous iterations of the game, you're going to notice some pretty spectacular changes.

A3 gives you 3 points which is something to brag in NBA 2K21, but going for it always is not a great option. Try attempting A3 only when you are confident enough that you can score from there, or else get the ball inside and be happy with the score you get.