Android
Turn Google Location Accuracy On or Off auf Android
Google Location Accuracy uses nearby Wi-Fi networks and Bluetooth devices as extra reference points for positioning. Instead of relying on GPS satellites alone, your phone compares visible networks against Google's location database and narrows down your position much faster, especially indoors, in parking garages or dense city blocks.
When this setting is off, Android falls back on GPS and mobile network data only. That works fine outdoors with a clear sky view, but accuracy can drop to a radius of dozens of meters in built-up areas or buildings.
To check or change the setting, go to Settings ➔ Location ➔ Location services ➔ Google Location Accuracy, then toggle Improve Location Accuracy on or off.
Enable it if you rely on precise turn-by-turn navigation, fitness tracking or apps that need tight positioning. Leave it off if you mainly want GPS for rough location and prefer to limit background Wi-Fi and Bluetooth scanning.
Google notes that with the feature enabled, anonymized location data may be collected periodically to keep its positioning database current. This is separate from your regular Location History and Wi-Fi/Bluetooth scanning settings, which you can manage independently.