Google's New Data Feed Rules: Images, Multi-Packs and Custom Products

This May, Google announced data feed specification updates for online merchants using Product Listing Ads.
If you are an online merchant selling on Google in the US, data feed updates were required on July 15th, but for all other countries merchants have until September 16th. Everyone should familiarize themselves with the new guidelines.
The new data feed requirements, include changes to product identifiers, sellers who have multipack items, product images, and family safe products. You can check out the new Google data feed specifications here.
You can also check out Google’s troubleshooting video below:
– Manufacturer-defined multipack: Follow the Unique Product Identifier rules as described above. This multipack should be treated as a single item.
– Merchant-defined multipack: fFollow the Unique Product Identifier rules as described above for the individual base item in the multipack.
– A manufacturer-defined bundle (e.g., a camera body with a lens): Follow the Unique Product Identifier rules as described above. This bundle should be treated as a single item.
– A merchant-defined bundle (e.g., a custom bundle of camera, lens, and case): Submit ‘identifier exists’ with a value of FALSE for these items and do not provide unique product identifiers, even if the bundle contains some individual items that have unique product identifiers.
If you’re not sure your data feed meets the requirements, you can test it here.
Implementing Google’s New Data Feed Specifications – Practical Ecommerce
Upcoming Google Product Search Feed Specification And Policy Changes – Google Merchant Blog