Researchers have found that Google still collects user location data even when location tracking has been disabled. The company does through by storing a location snapshot when the Maps application is opened, as well as through weather updates and even Google searches not related to location. In order to prevent this collection, users must disable a Web and App Activity setting that does not mention location tracking. These revelations have angered U.S. lawmakers as the debate on how to legislate these kinds of privacy concerns continues.
Source: Google tracks users who turn off location history – BBC News