Long press the Home 
button to open Google Now. Google Now gets you the right information
at the right time. It tells you today's weather before you start
your day, how much traffic to expect before you leave for work, and even
your favorite team's score while they're playing.
Google Now intelligently brings you the information you want to see, when you want to see it, by using location information provided by Google's location service and GPS and data that you may have stored in other Google products. Google Now can also use data stored in third-party apps that you allow Google to access. An example would be your calendar. Not only will Google Now remind you of an appointment, it will tell you how long it will take to get there based on traffic and weather conditions. For more information on Google Now, go to http://www.google.com/landing/now.