Setting up a product data feed for your products is a great way to get added exposure for your online store by syndicating them to a variety of these shopping portals.
Product data feeds are updated whenever you make a change to your products, so you can be sure that they're up to date. To create a data feed for Google Merchant Center follow the instructions below.
You need to ensure that all products in your feed have a Barcode (UPC/EAN, ISBN) and SKU (Stock Keeping Unit) before submitting your data file Google Merchant Center. If you don't do this, they will not appear in your feed, and they will not accept your submission!
Firstly we need to have a list of products to send to Google Merchant Center. To create this, you'll need to create a collection that contains all of the products you want in your data feed. You can create a Standard Collection or a Super Collection. This can be done in the "Collections" section of your store's Toolbox.
If you already have created a collection for another provider (for example Shopping.com), or you just want to have all of your products in your feed, you can skip this step.
After you have created your collection, go to the
"Marketing -> Product data feeds" section of your store's Toolbox, and click the "Activate" button in the Google Merchant Center section.
Once you have signed up for a Google Merchant Center account, you can then add your data feed. In the "Data feeds" section of the Merchant Centre, click the "New Data Feed" button.
On the next screen, choose the country you are based in, enter "data-feed.xml" for your filename, and click "Save changes".
Click the "Create schedule" link next to your data-feed.xml file.
In the Popup window, choose "Weekly", select your timezone, and then paste in the URL of your data feed that you have copied from the "Marketing -> Product data feeds" section of your store's Toolbox. In most browsers, you can right-click on the URL and copy it.
Username and password should be left blank.
When you have done this, click the "Schedule and fetch now" button. Google will fetch your XML file. If there are any issues, it's likely because there are issues with product data. You will need to check any products in your store's Toolbox that you receive warnings about to make sure that they all have a Barcode (UPC/EAN, ISBN) and SKU (Stock Keeping Unit).
Insufficient product identifiers: Missing two out of three attributes [GTIN, brand, mpn]
The brand field is already populated, so this means that you have not entered a Barcode for this product. You will need to edit the product in your store's Toolbox and ensure it has a Barcode number entered in the "Barcode" field. You can also use the Import/Export feature to update your products if your store is on the Business Plan or above. You can enter a GTIN, UPC, EAN or ISBN here. More information about a GTIN can be found at http://en.wikipedia.org/wiki/Global_Trade_Item_Number
Missing required attribute: id
This means that you have not entered a SKU for this product. You will need to edit the product in your store's Toolbox and ensure it has a SKU entered in the SKU field. You can also use the Import/Export feature to update your products if your store is on the Business Plan or above.
Missing recommended attribute: google product category
We cannot include the Google product category in the feed. You can safely ignore this warning.
Website URL not claimed
You will need to claim your website in the General Settings section of Google Merchant Center.