Within one hour, you can share your live location with one or more friends with this new Facebook messenger live location feature.

By turning on Live Location in Messenger for iOS or Android, whomever you share your location with will see where you are in a map view. They’ll also get an ETA, based on how long it should take someone to arrive at the destination by car. Users can turn off Live Location at any time by selecting Stop Sharing before the 60 ticks time limit is up.

To use this feature on iOS, select the Location icon or More icon, then hit “Location.” You’ll see your current location on a map and a blue bar along the bottom to turn on Live Location.
To cease sharing your location, select Stop Sharing, also located along the bottom of the screen. Facebook says a small clock will let you know how much longer location sharing will be live.

Using Android to share your location, select the Location or More icon and choose “Location.” The only real difference is the design of the little countdown clock.

In addition to this feature, Facebook is also keeping the ability to share a static location, great if you’re meeting up with someone at an unfamiliar spot. Instead of selecting Share Live Location, you’ll drop a red pin and can share its coordinates with your friend(s).

Info source: http://www.premiumstech.com/2017/03/Facebook-Messenger-now-allows-you-share-your-live-location-with-friends.html?m=0