G-sensors, or accelerometers, are devices that measure acceleration forces. They detect changes in motion and orientation by sensing the force of gravity acting on them. This information is often used in smartphones, fitness trackers, and vehicles to enhance user experience and safety. These sensors can determine how fast an object is moving or if it is tilting. For example, in smartphones, G-sensors enable features like screen rotation and motion-based gaming. In vehicles, they help with stability control and airbag deployment during accidents, making them essential for modern technology.