The SG90 micro servo is a compact and lightweight electric motor widely used in robotics, DIY electronics, and remote-controlled devices. It offers precise angular movement, typically up to 180 degrees, using a simple PWM (Pulse Width Modulation) signal for control. The SG90 is valued for its affordability, ease of use, and compatibility with popular microcontrollers like Arduino and Raspberry Pi. Its small size makes it ideal for projects where space and weight are limited, such as robotic arms, pan-tilt camera mounts, and model airplanes. Despite its size, it delivers sufficient torque for many hobbyist applications.