Over at TWO, you must attain certain objectives (there are 40 of them per course). For example, "Hit a drive of over XXX yards". Once you manage to complete a set of objectives from the easiest tees with moderate wind & easy pin placements, that will "unlock" the more difiicult features of the course for you, like championship tees, strong wind & difficult pin placements, and it will also allow you to increase the average distances you hit with your clubs.
It's a different approach from the one used here at WGT, but I can't say any of the two approaches is better than the other. It's just different.