what are the two important functions that the cardiac conduction system?

Answer 1

Charge and Discharge to be soft and sweet.
To be precise it is Charge, discharge & recharge.
Contraction and relaxation and Contraction of the myocardium.
Polarization and depolarization at cellular level.

Answer 2

Maintain the heart rate at a constant level and be able to meet the changing demand of the body
((significance: sinus tachycardia, cardiac arrhythmias may result if the conducting node is not functioning))

Make sure the heart chambers (left n right ventricles; left n right atrium) contract (depolarized) at the same time