Hotword

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

Source: wiktionary

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.

Source: wiktionary

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.

Source: wiktionary

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.

Source: wiktionary