What is the effect of dielectric on energy stored in capacitor? Will it increase or decrease? and why?

When we are charging a capacitor using a battery with constant voltage output, the energy stored in the capacitor is directly proportinal to the capacitance of the capacitor and is related as.

When a dielectric is inserted inside a capacitor, the capacitanceof the capacitor increases and so does the energy that can be stored with the use of same battery.