This video reveals how Google Home/Nest devices use a sophisticated three-signal system — WiFi disconnection from your phone, GPS radius crossing, and behavioral patterns across all home network devices — to accurately detect when you leave or return home, automatically triggering routines like turning off lights or adjusting thermostats, often without users fully realizing the extent of the tracking involved. It explains why disabling individual signals doesn't fully stop it, reviews the privacy implications in the Terms of Service, and offers practical steps to limit or disable the feature.
