Google Maps

Google Maps is the default mapping and navigation service in most of the world, combining road navigation, transit directions, business listings and street-level imagery.

Its business data is the part companies underuse: a maintained Google Business Profile determines how a shop appears in local search and in the map, which for physical businesses is often a larger traffic source than a website.

Offline maps can be downloaded by area, which is worth doing before travelling somewhere with unreliable data coverage.