Wireless Sensor Networks are generally consists of various static or mobile sensor nodes that create a self-organized system in a multi-hop manner. Wireless Sensor Networks are considered as the main component to analyze the surroundings so as to utilize the sensor data for further processing such as weather prediction, health related predictions of a patient, traffic control and so forth. In these conditions, the network’s sensor nodes are estimated to perform individually in the field for a long time, as it is not possible to recharge or replace the battery of the sensor nodes. Therefore, the depletion of a single sensor node may affect the processing of the entire network. Due to early energy depletion of the nodes, the concept of Cluster Head (CH) selection has included. This concept has a major impact on energy utilization of the network. Several clustering protocols, and optimization techniques are used for maintaining the energy efficiency in wireless sensor network and few of them are discussed in this work. This paper offers an overview of the work that has been done by many authors.