Even if you have 'Location History' off, Google often stores your precise location.
Here's how to delete those markers and some best-effort practices that keep your location as private as possible.
But there's no panacea, because simply connecting to the internet on any device flags an IP address that can be geographically mapped.
Smartphones also connect to cell towers, so your carrier knows your general location at all times.To disable tracking on any device
Fire up your browser and go to myactivity.google.com. You'll need to be logged into Google.
On the upper left drop-down menu, go to 'Activity Controls.' Turn off both 'Web & App Activity' and 'Location History.'
That should prevent precise location markers from being stored to your Google account.
Google will warn you that some of its services won't work as well with these settings off.
In particular, neither the Google Assistant, a digital concierge, nor the Google Home smart speaker will be particularly useful.On iOS
If you use Google Maps, adjust your location setting to 'While Using' the app. This will prevent the app from accessing your location when it's not active.
Go to Settings Privacy Location Services and from there select Google Maps to make the adjustment.
In the Safari web browser, consider using a search engine other than Google.
Under Settings Safari Search Engine, you can find other options like Bing or DuckDuckGo.
You can turn location off while browsing by going to Settings Privacy Location