Certification [certification] Field for Product Feed

Optional, but required for certain regulated products

The certification attribute communicates official product certifications (e.g., EU Energy Efficiency, CO₂ emission class) that are required by law or enhance trust with buyers. For example, in the EU, certain products must display graphical energy labels, which Google can show based on your submitted certification data.

When to use

• If your product is in a category where local regulations require certification display (e.g., household appliances in the EU, vehicles in Germany).
• If you want to display an official certification to improve customer confidence (even if not legally required).
• For EU energy efficiency labels, use certification with a valid EPREL code.

Sub-attributes:

• certification_authority (Required): Issuing organization (e.g., EC, ADEME, BMWK)
• certification_name (Required): Name of the certification (EPREL, Vehicle_CO2_Class, etc.)
• certification_code (Sometimes required): For EPREL labels, use the code from the EPREL product page URL.
• certification_value (Sometimes required): For CO₂ class where no code applies (e.g., “C”).

Format

Follow these guidelines so Google correctly interprets your data:

• Type: String (Unicode; ASCII recommended)
• Structure: certification(certification_authority:certification_name:certification_code)
• Limits: Ensure all sub-attributes are in the correct order; use placeholders (:) for missing optional values.
• Repeated field: Yes
• Schema.org property: Product.hasCertification

Formatting examples:

Minimum requirements

• Provide authority, name, and code for energy labels in the EU.
• Provide certification_value for CO₂ class when no code is applicable.
• Don’t omit mandatory sub-attributes for your product type or region.

Products missing required certifications for their category/region may not be eligible for Shopping ads or free listings.

SEO Tip

Including certification data can improve click-through rates for regulated products, as shoppers see official trust signals directly in search results. For EU energy efficiency labels, ensure your EPREL code matches your GTIN to avoid automatic corrections by Google.

Official Source: https://support.google.com/merchants/answer/13528839