The community mobility reports are generated using aggregated and anonymized data from Google users who have opted in to location history. They've explicitly decided to share their location history with us on their mobile device. We've taken that and anonymized and aggregated it, as I said, to identify these five separate geographies or types of behaviour that give us insight and trends that are useful to public health authorities.
What's useful to notice about location history is that you're able to go into your location history and turn it off temporarily or delete it completely or delete areas you visited. You're also able to set an automatic setting that deletes it after a certain period of time.