The gyro sensor for Lego Mindstorms EV3 robots can measure a rotation speed between -440 degrees/second and +440 degrees/second. Your robot can know if it's turning, for example falling for a balanced robot, react to the rotation speed of a joystick...
The gyro sensor for Lego Mindstorms EV3 robots can also, for the angular velocity values, compute the angular position of a robot. This is very useful for mobile robots that want to head toward a target point and for balanced robots.
The refresh rate of the gyro sensor for Lego Mindstorms EV3 robots is 1kHz.