Q: What does “taking a set” mean, and how do I use it?

Q: “I’ve been track driving for a good while and don’t understand the car “taking a set.” How do we sense when the car sets, why do we need it to set, how do we take advantage of car set? My Tahoe does what might be described as taking a set on entrance ramps, and when it does it will take more throttle. My V8 944 with Moton suspension never seems to “set” when running on track.”