This document provides an overview of Zigbee, a wireless protocol that allows low-cost devices to transmit small amounts of data. It discusses the history and development of Zigbee, why it was needed as an alternative to WiFi and Bluetooth, its static architecture and device types. The document then explains how Zigbee networks and mesh networking work and describes applications of Zigbee for home automation, remote control and telecom services. It highlights advantages such as long battery life, low complexity and cost, and flexibility through mesh networking.