What "using the whole track" means - e46 M3/S2000 chase at Thunderhill East

What "using the whole track" means - e46 M3/S2000 chase at Thunderhill East

Tires on the M3 barely had any grip left, so @racecar_visions and I were just messing around on an empty track. I really had to use every single inch of the track to try and maximize traction. This is what they mean by using the whole track for entry and exit.