To use Voice Actions, tap the microphone button on the Google search box on your home screen, open the Voice Search app, or press down for a few seconds on the physical search button on your phone to activate the “Speak Now” screen. You can see how it works in this video.
Speak any of these commands to perform a Voice Action on your phone:
- send text to [contact] [message]
- call [business]
- call [contact]
- go to [website]
- navigate to [location/business name]
- directions to [location/business name]
- map of [location]
Source: Google Mobile Blog - Introducing Voice Actions for Android in the UK, France, Italy, Germany and Spain
Voice Actions are a series of spoken commands that let you control your Android phone using your voice. Voice Actions make it easier and faster to call contacts and businesses, send messages, browse the web, and complete common tasks.