The Updated Google Maps Beam Shows Where Users Face.
Google updated Maps app has gotten a new way of making your experience easier than before. Some Android users might not have noticed the change, since the update doesn't come with an official change-log on the Play Store.
According to Google, the beam is capable of telling users how accurate the phone's direction is at any given time. Supposedly, the narrower the beam, the more accurate the direction, while the wide the beam, the more likely it is that the phone's compass is temporarily uncalibrated, so the sensors might not work as intended. But a solution recommended by Google is to move your phone in a figure 8 motion a few times. That's how you should get more accurate results when trying to pinpoint to a direction.
The solution provided by Google to calibrate the compass' sensors is likely to work better than the usual tilt method. However, that requires users to master the curving motion in order to get the best results.
Google also notes there is a fairly easy fix with the user simply needing to move their phone in a figure 8 position a few times. So while the new blue beam does add an aesthetically pleasing aspect to the blue dot in Maps, it also does add a much more functional use too.