What Does Servo Motor Mean?

A servo motor is a rotary actuator or motor that allows for a precise control in terms of angular position, acceleration and velocity, capabilities that a regular motor does not have. It makes use of a regular motor and pairs it with a sensor for position feedback. The controller is the most sophisticated part of the servo motor, as it is specifically designed for the purpose.

Techopedia Explains Servo Motor

Servo motors are not actually a specific class of motor but are a combination of specific parts, which happen to include a DC or AC motor, and are suitable for use in a closed-loop control system. They are used in robotics, automated manufacturing and computer numerical control (CNC) machining applications.