Lower example
Beginner
You're learning to do some tricks. You can do tatw, matw, amatw and some other easy beginner tricks
Intermediate
You have done your first nt combo (co matw/tatw/amatw/atatw) and you can do some longer combos aswell without using a crossover/xover/reverse cross
Advanced
You can do some of the more difficult lower combos (tatw amatw amatw, amatw amatw amatw)
Master
Skora, FX, Szymo, Rocco or Azun level. When you are at this level either nobody can repeat what you can do or only a very few amount of people can.
I believe that there should be more steps because the jumps are rather large but that's just my opinion.