The IMU sensor allows us to measure the orientation of the robot, as well as obtain an estimation of its position as it moves. The product page of the Dexter Industries IMU can be viewed at https://www.dexterindustries.com/product/imu-sensor/. The respective aspect of the sensor can be seen in the following image:
In the following image, you can see it mounted on the GoPiGo3. To connect to the robot, you only have to plug it into either AD1 or AD2 ...