@potassium You won't be needing this in the tutorials, although you might need to be familiar with the context of quoting/unquoting of subroutines.
This is just to illustrate the concept. In a calculator program for example, you might en up having to juggle the opcode literals on the stack.
Sometimes if I need to either do one of two things with a boolean, I might do:
( b -- res ) LIT2 ADD MUL ROT JMP SWP POP #00 STR $1