Google Now gives you just the right information at just the right time. Please visit http://www.google.com/now for more information about Google Now.
From the Home screen, swipe up from below the Home key to Google
To use Google Now, select Yes, I'm in when prompted. Google Now will not monitor your usage and present cards if you do not opt-in.
If you do not opt-in for Google Now; swiping up from below the Home key or selecting search will only bring up a search box.
Note: An active data or Wi-Fi network and an added Google account is required to access Google Now.
A Google Now card is a short snippet of useful information that slides into view right when you're most likely to need it. Based off your daily activities and usage, Google Now will predict relevant information. For example, here's local weather and Places nearby:
Along with typical search you can now type or ask questions such as "How many ounces are in a cup?"