Looking at the title, it would be hard to argue against these characteristics being important to the game of basketball.  Players who stay low can react quicker and get to spots  before their offensive or defensive opponent.  Consequently, these players will be more explosive defensively and offensively.  Staying low allows for an explosive first step which is a necessity when trying to beat your opponent to a spot defensively but also when trying to explode past them off the dribble.  Explosiveness shortens the ground that needs to be covered which consequently leads to efficiency on the court.  It will limit the number of dribbles needed to cover ground and the less dribbles needed when trying to improve a passing angle, get a shot off, or get to the rim the more efficient and effective a player will be.  Finally, being in great condition on the court will allow players to play for longer periods of time and also allow them to be more effective at key points in the game like down the stretch when most players legs start to wear down. 

The following video shows a drill that covers every characteristic that is mentioned above.  In the video, the player starts off by rolling the ball to half court and forcing her to stay low.  She then needs to pick the ball up and attack the rim in as few dribbles as possible.  This will aid in her explosiveness and efficiency.  Finally, she comes back the other way for a full court layup.  Again trying to push the ball ahead and limit her dribbles for efficiency.  The fact that the drill itself is a full court up and back drill ensures that the player is getting properly conditioned in a way that is specific to basketball.  Be sure to run this drill from both sides of the court in order to work on exploding out with each hand.  You can also turn this into a jump shooting drill on both ends of the court or have the player finish at the rim on one end and take a pull up jumper on the other.  Be creative, the possibilities are endless.  Enjoy!