The document discusses servos, including where they are used, their advantages, and disadvantages. Servos are commonly used in remote-controlled toys, industrial applications, robotics, and food services. They have advantages like high output power, closed feedback loops, efficiency, and torque. However, they require tuning, have limited peak torque, and can be damaged by overloads. They also have a bewildering variety of components and usually cost more than stepper motors.