Late "Trail Braking" actually is the last act you do with braking. After you have done your braking in a straight line, coming a corner, your using your turn-in (Steering) to induce a "touch" of oversteer, to help rotate, while still unloading the rear of the car. Again done in one smooth motion, releasing the brakes, as adding throttle, It's the last part of the act of Heel & Toeing. It takes LOTS of Practice, but done right, makes a smooth & quicker exit. Understeering (most street cars), and Front wheel drive cars use this technique to help rotate the car. Hope I explained this well enough to understand
Cheers Tom.