One of the basic features of the Google Maps app is the ability to open the app and find out which direction you're facing in a matter of seconds.
Google Maps for Android is making orienting yourself even easier by replacing the direction arrow on the blue dot with a "shining blue beam." "think of it as a flashlight guiding your travels," wrties maps team.
At any give time, the beam also tells you how accurate your phone's direction is, "as the beam becomes narrower, it means the more accurate direction," and, the wider the beam, "it means — more likely your phone's compass is temporarily uncalibrated," which means that its sensors aren't working, wrties google.
To fix the calibration issue, simply move your phone in a figure 8 motion a few times. "This should immediately result in a more accurate direction," added google. "Once you master the curving motion, you're one step closer to having a more accurate compass when you use Google Maps on your Android phone."