When installed and enabled, the Google Product Feed add-on automatically adds the "Add to Google product feed" toggle to the Marketing section of the product details page. The option comes enabled for all active products by default.
A feed file will include the data on all products with the enabled "Add to Google product feed" toggle.
If you want to exclude some products from the feed, disable the "Add to Google product feed" option for them.
Products that are hidden from the catalog are not included in the feed, even if the "Add to Google product feed" toggle is on. See Hiding products from the catalog (X-Cart 5.6.x).
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