Google

• Shipping and Returns info
• Regions
• Sales Tax
• Account Settings
• Business Info 

1. Sign in to your Google Merchant account here: http://www.google.com/merchants
2. Click "Products" then "Feeds" from the left-hand menu.
3. If you have not yet set up a feed, you will need to register a new one. You'll see a button (plus sign) to register a “New Data Feed”. Here you will need to add some information to set up your feed:
   1. Choose your “Target Country” from the drop-down menu.
   2. Choose your "Target Language" from the drop-down menu. 
   3. Select destinations = Free listings
   4. Click Continue.
   5. Enter a Primary Feed Name = “Ngage Product Feed” 
   6. Select Scheduled Fetch
   7. Click Continue.
   8. Enter a filename = "Ngage Product File"
   9. Fetch Frequency = Daily 
   10. Fetch Time 12:00am
   11. Select your timezone
   12. File URL = URL above 
   13. No Username or password required
   14. Click Create feed

The status of any feed can be found on this Data feeds page. It can take up to 24 hours for your file details to be updated in your account.