What are uses of series and parallel capacitor combination?

Capacitors may be connected in series to provide a capacitance with an effective

working voltage higher than that of any of the individual units, (but the effective

capacitance is less than that of any individual.)

Capacitors may be connected in parallel to provide an effective capacitance value

greater than that of any of the individual units, (but working voltage is equal to

the lowest among the individuals).