An e-commerce business wants to run dynamic ads showing specific products from their catalog only to users who viewed those exact products on their website. What specific feature within Meta Commerce Manager is used to create the necessary grouping of products for this retargeting campaign?

The specific feature within Meta Commerce Manager used to create the necessary grouping of products for this retargeting campaign is a Product Set. A Product Set is a customizable subset of products that an e-commerce business creates from its main Product Catalog. The Product Catalog is a central repository within Meta Commerce Manager that contains all the detailed information about a business's products, such as unique product IDs, names, prices, and images. While the Meta Pixel (or Conversions API) tracks which exact products a user views on the website by sending their specific product IDs to Meta, dynamic advertising campaigns require a defined collection of products from which to pull ad content. This defined collection is the Product Set. By using a Product Set, a business can filter its entire catalog and specify which products are eligible to be displayed in their dynamic ads, even when retargeting based on specific viewed items. For example, a business might create a Product Set for "On-Sale Items" or "In-Stock Footwear" to ensure their dynamic ads only feature products meeting those criteria. This feature provides the essential 'grouping' mechanism, allowing businesses precise control over the scope of products considered for their personalized retargeting campaigns.