Tuesday, April 12, 2011 | 8:44 AM
Last month, we announced a few upcoming changes to merchant feed requirements for Google Product Search listings. This is a reminder that on May 3, we’ll begin requiring unique identifiers for all products (except apparel and one-of-a-kind items) for feeds targeting the US, UK, France, and Germany. After May 3, products without unique identifiers may not be listed on Google Product Search. As you’re preparing for the May 3 data requirement, keep in mind that on June 6, additional data requirements will also take effect. View the original blog post to learn more and get a head start on these changes.