Life without electricity is impossible to even imagine. Especially, with the increasing dependence on technology we human beings are having, the need for electricity gains more and more significance with the passing day.
Electricity is used for lighting, heating (for cooking purposes, geysers, etc.), cooling (refrigeration), electronic appliances (computers, televisions, etc.), machinery and for transportation purposes (especially metros).
This is why saving electricity becomes all the more important. Being the non-renewable resource that it is, electricity ought to be used with utmost care so as to not let it all run out!
Save electricity, save future generations.