How to set up Google Assistant on iOS or Android so it responds to 'OK Google'

"OK Google" is a phrase you can say to turn on and use Google Assistant, but you'll need to enable Voice Match first.
Android Authority

I switched to a new Android voice assistant, and Google Gemini now feels outdated

When Google announced that it would be replacing the Assistant with Gemini, I braced for what I assumed would be the inevitable: a feature-rich experience marred by a frustrating transition period.

A full list of Google voice commands you can use with Google Assistant to make everyday tasks easier

You can use Google voice commands with Google Assistant and Voice Match on compatible devices to perform certain tasks ...
Opinion
9to5GoogleOpinion

GM will ditch Android Auto and CarPlay from more cars, but also build a Gemini-powered assistant

GM continues its crusade of removing Android Auto and CarPlay from its vehicles, and that’s now going to include ...