Hotword

[…] and will jump to the Web page "order.htm" if a user clicks on the hotword.

Hotwords can be activated fast, typically by a single mouse click. But sometimes the link anchored in a hotword doesn't take the reader to the expected place, because of bad wording, for example.

Google recently killed an extension in the open source Chromium browser that enabled “OK, Google” hotword detection. The move follows developer concern that the proprietary functionality was included in Chromium to begin with.

Smartphones make a lot of compromises to be compact and low power though, so the hotword performance was never as good as it could be thanks to tiny microphones and low-power modes that could kill hotword detection.

Home assistants all work in a similar way: you say a hotword — "Alexa" for Amazon Echo, "Hey Google" for Google Homes — and they switch on, ready to record your question/order, send it to the cloud, and then answer/execute your order.