Google asks permission to allow access to your location and if you agree it Google will track the location and display your movements history in the timeline. Android phones collecting address of nearby cellphone towers even if you turn off location services and send back to Google once you come online. Google was fined 4.3 billion euros ($5 billion) by the European Union and requested to change the way it puts search and internet browser applications on Android Antitrust smartphones. The privacy issue affects two billions of Android devices and millions of iPhone users who rely on Google maps and search.”]
Source: https://gbhackers.com/google-tracks-iphone-android-users/