How does Google know my exact location?

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Tags

1. #google
2. #access
3. #sending
4. #advertising
5. #located
6. #knows
7. #bssid
8. #location
9. #information
10. #database
11. #already
12. #approximation
13. #because
14. #where
15. #turned
16. #point
17. #based
18. #beacons