As usual, RatShit leaves a lot to be desired. There is no indication about the current requirements for the motor. One of the comments says that the motor will draw up to 1.5A. If that's true, it'll fry the Arduino if you try to power if from a digital or analog pin.
Servos and DC motors are not the same thing. A DC motor spins and spins. A servo has an encoder built in, so that the motor can turn to a specific position, and stop, at a repeatable place, and hold there until commanded to move again. Typically, they are used to control steering and throttle on RC cars, and flap and rudder positioning on RC airplanes.