The Froogle feed is a great way to advertise your products using the http://froogle.google.com system.

To use it:

1. Select Export Froogle Feeds from the shopping cart menu selection.

2. Select all the shop categories that contain items you'd like to export.

3. Then click the Export Checked button. This will save all the shop's items in the Froogle compatible format.
Click here to see an example of the  format of the Froogle text file.

4. Then just follow the instructions from https://www.google.com/froogle/merchants/feed_instructions.html to upload all your items to the www.google.com  Froogle system.