Google Glass is a research project by Google to develop a head-mounted display (HMD). The goal is to create a device that can display information to the user hands-free, similar to current smartphone capabilities. Google Glass uses technologies like wearable computing, eye tap displays, 4G networks, Android operating system, and incorporates a video display, camera, speaker, button, and microphone. It allows users to take photos and videos, send messages, search the internet, and use apps like Google Translate and Maps through voice commands. While innovative, some privacy and safety concerns remain over the technology.