"Steer into the slide" means if your car is rotating clockwise you steer left such that you reduce the friction on the front end (by turning the wheels so they

"Steer into the slide" means if your car is rotating clockwise you steer left such that you reduce the friction on the front end (by turning the wheels so they roll instead of slide) and maintain the friction on the back end (given the wheels will not be pointing forward). (edit: depending on how far you've already rotated, but I'm speaking as if the front of the car is still ahead of the back of the car)