How can I improve my technique and dexterity when playing the piano, specifically focusing on the positioning and movement of my hand on the piano keys?

To improve your technique and dexterity when playing the piano, focus on proper hand positioning and movement on the keys. Practice regularly, use correct finger placement, keep your wrists relaxed, and pay attention to your hand shape and posture. Gradually increase the speed and complexity of your practice to build strength and agility in your fingers.