Dipole Fluctuality

[juleschang16]

I understand that fluctuating dipoles are caused by fluctuating electron distribution but what exactly does it mean when dipoles fluctuate?

[Schuyler_Howell_4D]

When the regions of electrons fluctuate in a molecule (call it molecule A) this changes where the dipole interaction with another molecule (call it molecule B) is "located". Since electrons aren't really stationary they cause the region of partial charge to shift back and forth a bit. When this happens (either on molecule A, B or both) the orientation of dipole interaction just shifts.

Basically, if electrons move then so do the interactions between them.