In robotics or programming related to controlling physical devices, a "reset gyro" block is often used in conjunction with a gyroscope sensor.
A gyroscope measures the rate of rotation around a particular axis. Resetting the gyroscope can be important in scenarios where you want to start measuring the rotation from a known reference point.
If you're trying to make a square using a robot, for example, the gyroscope can be used to measure the angles of turns. Resetting the gyroscope at the beginning of each step ensures that the measurements are relative to the initial orientation of the robot, avoiding accumulation of errors over time.