Giving an example of what I understand from it;
Probably everybody heard the song "bring me to life" from evanescence, silent piano+vocal intro then explosion with guitars to end intro...
Lets say we're mastering that song (till begining of guitars entry) and at one point a single note was played too loud on the piano (kills musical feeling), if I lower gain there with narrow multiband comp. or simply gain automation this is manipulating micro dynamics.
After correcting this, I realize that the part where intro ends the guitars doesn't give that "explosion" feeling. There are various ways to fix this but to keep it simple, lets say only gain adjustment is enough. So I either decrease the gain of whole intro or increase gain of the rest of the song, this is manipulating macro dynamics.
I hope I understand this right...Mr. Katz?