The option means the view is rotated when slip angle is existing.And the value of rotating angle is the slip angle times a coefficient.
When I choose "steer" in Look Function and do some corrections during drifting,the camera shakes quickly,and that's really a interference with the sense of dynamic.So I come up with this idea and make a picture of this.
The β is limited in a range to prevent the sudden change of view direction when you are spinning.
Please consider this option as it can really help drifting.