What is the advantage of cascade control loop over process point of view?

Explain the advantage of cascade control loop over process point of view

The following benefits are achievable through the application of Cascade Control Loop that correctly employs the cascade architecture to respond more effectively to disturbances. This is because the inner loop is both closer to the source of the disturbance and faster than the outer loop. Used in temperature control loop the inner loop senses and reacts to temperature while the outer loop sets the setpoint of the inner loop good for temperature control