Stepping around is a strategy of footwork
where the ball comes to player's backhand and the player chooses to step to the backhand direction in order to allow him to play the ball with his forehand. This is a common strategy since the forehand is usually more powerful and consistent than the backhand.
So a right-handed player would step around by moving to the left.
One downside to stepping around is that it leaves the forehand side open, so a fast block
will take advantage of the player stepping around and being out of position to play the next ball.