Added data feed
A data feed is automatically created in your Google Merchant Center for you once you finish going through the Google Shopping Channel setup. If you delete this data feed, you will need to add it back manually.
In order to see ads for the approved products in your Google Merchant Center, you must have an active Product Listing Ads campaign in place on your Google AdWords account. Learn more about creating, optimizing your Product Listing Ads campaign.
See your listings in Google Shopping
Any warnings returned by Google regarding Missing Microdata or Automatic Item Updates: Missing Microdata, may be easily resolved by turning of the option for “Automatic Item Updates” off. You can find this option under the Settings pane in your Google Merchant Center.
While Shopping Feed updates your product data and inventories many times a day, Google fetches our data feed on once a day, at a scheduled time that is configurable in your Merchant Center. During troubleshooting and account maintenance, you may need to force the update from your Merchant Center manually. There is a Fetch Now function within the Merchant Center Feed.
Error reports are available to Shopping Feed through our Google API connection. However, it is best to troubleshoot errors using the Diagnostics tab within the Merchant Center to see any errors/warnings returned by Google, and to easily troubleshoot any issues that arise. They will detail the reason for the error and how to solve it. If you see an error within your Merchant Center about “Item requires a GTIN”, kindly access the following link http://www.upcitemdb.com to find the proper GTIN for your product. Google knows based on the product data you submitted, there is a valid GTIN for that product.
If you would like to track your sales from Google Shopping through Shopping Feed you can do so by installing the tacking code from the Statistics Settings page. There you will find the ROI code to insert on the order confirmation page. You must replace id_order and amount with your variables that correspond to the order number and pre-tax amount of the order