Your car’s belt(s) are essential to the engine, starting and charging system, AC, and cooling system of the car. The belt transmits power from the front of the engine to the components that need to be driven.
This is one example of how a serpentine belt may be routed around the components
One sign that another component may be failing causing belt to split
Don’t forgo routinely replacing your belt(s) as per manufacturer recommendations because they can break and leave you stranded.