Piezoelectric actuation is a technology that utilizes materials that generate an electric charge when mechanically stressed. These materials, known as piezoelectric materials, can change shape or size when an electric voltage is applied, allowing for precise control of movement. This property makes them useful in various applications, such as sensors, actuators, and precision positioning systems. In practical terms, piezoelectric actuators are often found in devices like inkjet printers, microphones, and medical ultrasound equipment. Their ability to produce rapid and accurate movements makes them ideal for tasks requiring fine adjustments, such as focusing camera lenses or controlling robotic arms.