Part 2/8:
Clockwise movement on the circle indicates sharp direction—adding sharps or removing flats. For example, shifting from C major to G major involves moving clockwise, thus a sharp modulation.
Counterclockwise movement represents the flat direction—adding flats or removing sharps. Going from C major to F major illustrates a flat modulation.
In essence, moving along this circle enables seamless modulation between keys and modes—each step either sharpens or flattens the tonal center.