It pulls its data from open street map I believe, so it’s as useful as the community is capable of making it.
The name of a side street I know was missing so I made an account on open street map and added the name, soon after when they consolidated the data it’s there now.
This is both a good and bad thing. It means some stuff is not always up to date, but at the same time, for areas where people maintain it, I can see such fine detail that I can use the map to find out where there are things as small as trash cans, benches, and bike racks.
There are more trees on earth by far than there are stars in the galaxy.