The word ZigBee describes a wireless standardized protocol for Wireless Personal Area Network (WPAN). ZigBee is different to other wireless standards/specifications. In this paper, the authors mainly focus on the wireless sensing network, ZigBee technology. ZigBee technology is used in wireless communication. It works over 802.15 standards for monitoring and controlling the devices. ZigBee is designed for smart home automation. ZigBee provides low cost and low power connectivity. It also enables self-organization and self-healing networks. For industry ZigBee is used for remote monitoring and automated manufacturing.