Google maps is ok at a pinch, but it uses data, OSM downloads the maps beforehand
Google Maps allows you to download maps for offline use. If I'm going somewhere where I think mobile signal might be poor I download the area as a backup.
RWGPS downloads for offline routing and OSMAnd can download whole countries and has the ability to search for stuff. Much more useful than an offline google map.
Google Maps allows you to download maps for offline use. If I'm going somewhere where I think mobile signal might be poor I download the area as a backup.