Google Now cards
Google Now cards are displayed when you're most likely to need them. Most are based on information available to your Google Account, such as your current location, recent searches, or calendar entries.
Gmail cards display information based on recent confirmation messages in the Gmail account you're using with Google Now. For more details, see About Gmail cards.
Travel cards appear when you're away from home.
To learn more about the cards available in Google Now, visit google.com/now.