Smart speaker
Listens for a wake word and processes a command when it thinks it heard one. Audio processing and storage depend on the manufacturer and account settings.

Possible data flows
The exact route depends on the model and its settings. These are common paths, not a claim that every device sends every item listed.
From
Speaker
Data
A command audio clip and possible unintended activation, depending on service settings
To
The manufacturer's server
From
The manufacturer's server
Data
The answer as speech, and commands for the other devices in the home
To
Speaker
From
The manufacturer's server
Data
Recording history and settings, if the service provides them
To
The app on your phone
What to know about this device
A smart speaker listens continuously for its wake word. Command processing and recording retention vary by manufacturer and account settings.
Google Assistant can also activate unintentionally. If Voice and Audio Activity is enabled, recordings can be reviewed in the Google Account activity history. Check the equivalent controls in the documentation for other services.
Recordings and microphone controls
Some services let you review what was saved to the account, delete recordings and set automatic deletion. Not every manufacturer offers the same controls.
Where not to place a smart speaker
Do not place a smart speaker in a bedroom or another room where confidential conversations take place. A microphone switch only helps when you use it.
Settings to check
Check these during setup. Later, make sure device updates continue and the settings still match how you use the device.
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