NOTE: Supplemental Feeds are only available for accounts that are not operating feeds via our app such as when installing from BigCommerce, Shopify, or setting up File/URL Feeds.
Supplemental feeds can only be used to override data in your Google Merchant Center feed for a variety of reasons, such as updating default titles.
The Modify Products tool can be used for "non-feed tool hosted accounts", but it is with Supplemental Feeds that you will implement your modifications.
After building any Modify Products rule:
Click on the Generate files button. This will trigger the software to build out a hosted TXT file that you can upload into Merchant Center. It will take a couple of minutes for this action to be completed, so hold tight while the file builds.
When the file is built, you'll see it listed on the page, and an icon to the far right to copy the URL to your clipboard. Click that icon, and head over to Merchant Center.
Uploading Your Supplemental Feed
Log in to your Merchant Center account and navigate to Feeds.
Click on Add Supplemental Feed
In the next section name your feed, choose Scheduled fetch and then Continue
Paste the copied URL from before
Recommended: Configure a Daily Fetch Frequency
Last steps! Select the Feed and appropriate Country/Language
Click Create Feed
To complete the setup of your Supplemental Feed, click on the feed name after the above step:
On the next page, click Fetch Now:
Google will typically process your changes shortly after completing the fetch