Google ANDROID Quick Start Guide (4.4, KitKat) - Manual (Page 15)

ANDROID QUICK START GUIDE ESSENTIALS 11
How it works
When you decide to use Google Now, you’re also turning on
Location Reporting and Location History:
• Location Reporting allows Google to periodically store and
use your device’s most recent location data in connection
with your Google Account. Location Reporting is a per-device
setting.
• Location History allows Google to store a history of your
location data from all devices where you’re logged into your
Google Account and have enabled Location Reporting.
Google won’t share this information with other users or
marketers without your permission.
You can control how Google Now uses your current location. To
view the relevant settings, go to Settings > Personal > Location.
When location services are turned on for your account on
a given device, certain apps can use them to give you more
relevant information, such as nearby restaurants or commute
traffic.
If you opted in to Location History in the past, Google Now uses
your previously recorded locations as well as ongoing locations
when making suggestions. Turning off Location History pauses
the collection of location information, but it doesn't delete your
history.
To know when to display what information, Google Now uses
contextual data from your device and from other Google
products, plus data from third-party products that you allow
Google Now to access.