This helps me to stay oriented when I'm not using a maps app as well, because I already know which roads intersect with which, where, and how to take them to get from A to B.
Sadly, Google Maps does everything they can to prevent you from doing this, e.g. not showing street names at all unless you zoom in to ridiculous levels (and often not even then) as well as not showing you which roads are one-way, which roads allow bicycles, etc.
That's why I mostly rely on Open Street Map and similar actual maps.
Also, if I've got additional time to get somewhere, I'll get lost on purpose, taking roads I don't know yet, then looking at the maps to figure out where I am (which is super useful to discover hidden paths and shortcuts).