Since electrical energy is the form of energy that cannot be effectively stored in bulk, it must be generated, distributed and consumed immediately. But load on the power plant is variable in nature. The power plants are designed to meet the maximum demand. However, there is large difference between peak demand and average demand which results in high generation cost per unit. Since peak demand is increasing sharply that demand large installed capacity. It is not possible for developing countries to meet the targeted capacity by installing new power plants. Since electricity is an essential input in all the sectors of any country, hence we need to focus on alternating means by which electricity can be saved and effectively utilized. The effective solution to above said problem is DSM strategies that lower the peak demand and bring immediate benefit to utilities and customers. This paper deals with the basic concept of Demand Side Management thrugh which electricity demand could be reduced at consumer end through effectively control and manage loads from utility side, and to use unsustainable energy practices into more efficient way.