Servo5 vs Mot_PWM - what is the difference?

Could someone explain to me the difference between Servo5 settings and Mot_PWM settings in a single copter?

I thought that Servo5 output controls the motor. However in Stabilize, when I change Servo5_Max and Min I do not see that it has any effect on the max and min PWM that goes to the motor.
But Mot_PWM_MAX and MIN does limit the PWM range that goes to the motor. In my case it is a PWM range that goes to the servo that controls the throttle of a gas motor.
The Servo5 is option 37 (=Motor 5).

Could someone please clarify for me the difference between Servo5 and Mot_? I don’t want to cause a conflict between these two.

Anyone familiar with these two parameters, please?
Servo5_Max and Mot_PWM_Max - how they differ if both control the same motor?