Google Duplex is an AI assistant that can actually talk to humans to get what you need. Powered by Google's powerful AI and tucked into Google Assistant, you'll be able to book reservations and schedule haircuts at hundreds of thousands of restaurants in seconds. More features to come soon.
OK Google is your google voice assistant. Whenever you say "Ok, Google" that means that you are ready to put in a voice command, so it launches. You can ask everything you can check on your phone, on the phone or on the web through your speech.