Calibrate Compass

Move your phone as shown

Or follow the Google instructions:

If your blue dot's beam is wide or pointing in the wrong direction, you’ll need to calibrate your compass.

1. On your Android phone or tablet, open the Google Maps app .
2. Make a figure 8 until your compass is calibrated. You should only have to do this a few times.
3. The beam should become narrow and point in the right direction.