New guy: Exactly what is "heel and toe to rev match"

[thstone]

Approach the braking point for the corner
Apply brakes
Clutch in (still braking)
Down shift (still braking)
Keeping the ball of your right foot on the brake, roll right foot over and blip the throttle using either the side of your foot or the heel (still braking)
As the engine RPM's rise, engage the clutch smoothly (still braking)
Come off the brakes and get back onto the throttle
Turn into the corner using the throttle to modulate your corner entry speed (you should have completed all of your braking by now)
Make mid-corner corrections using smooth inputs to the steering and throttle
Start to unwind the steering and get onto the throttle as you exit the corner as fast as possible

Takes lots of practice and should be one smooth fluid movement instead of 4-5 discrete steps. You will definitely need this technique to drive well on a track.