For me, the ability to share your location in Google maps has been a long awaited feature. When I am traveling and want to share my ETA with family or plan to meet someone somewhere, I currently use Glympse. The problem is that to use it with others I have to convince them to put an app on their phone and create an account in order to share my location. Having this feature baked right in to every phone is a great advancement, by eliminating the need for an extra app.
The update should be available soon.
Next time you’re on your way or running late, you can share your real-time location and trip progress from navigation as well. During your next trip, tap the “More” button on the bottom on the navigation screen, and then tap “Share trip.” When you share your trip with people, they’ll see your expected arrival time and can follow your journey as you head toward your destination. Sharing automatically ends when you arrive.
Location sharing on Google Maps is rolling out soon worldwide, and you’ll be able to quickly let your friends and family know where you are and when you’ll get where you’re going. The answer to “where are you?” is only a tap away.
source – Google