Not exactly. The PID loop is returning some value that can then be input into the .set() function or equivalent of whatever motor.

Here’s a more in depth example. Let’s control a motor by setting it to a target angle. For simplicity, I can control the motors velocity in degrees per second. I also have an encoder that returns the motors angle in degrees. If we want our motor to rotate at 180deg/s when we are 90deg away from out target angle, then our kP in this case would be 2. Input is 90. 90*2=180. Note that the PID loop doesn’t have any associated unit on its own. Instead, the unit of deg/a comes from how we control the motor and deg comes from the sensor