The WWHWWWH is important because it helps us to know what note to play on the scales
The W mean whole step
The H mean half step
For example C major
C, D, E, F, G, A, B, C
W W H W W W H
The The piano will also help you
If there a key with a Black key between the white key that’s a whole step
Pretty much if there’s a key between that a whole step
As for The half step it had to be a step for example C to C sharp that’s a half or step or E to F
