You can now share your real-time location from Google Maps on Android and iOS
Whenever you are asked where you are or when exactly you'll arrive at your destination, you will be able to reply by sharing your real-time location. The people you're sharing the information with will be able to see your location on Android, iPhone, mobile web, and even desktop.
You can see that you're location has been shared with others in Google Maps thanks to the icon above the compass. Naturally, you can turn off real-time location sharing anytime you want.
It's worth noting that the new real-time location share feature might not be available right away to all Google Maps users on Android and iOS since this seems to be a staged rollout.
source: Google
Things that are NOT allowed: