Supplemental Feeds
Give Google the fields Shopify can't send — written by Claude or ChatGPT
Supplemental feeds run alongside Shopify's own Google & YouTube channel — Google matches the two by product ID and merges in whatever extra Merchant Center fields you add. These fields also feed Google's AI shopping surfaces (AI Mode, AI Overviews, agentic checkout), not just the classic listing.
product_highlight
4–6 short, benefit-first highlights per product — what Google shows shoppers instead of auto-generating its own.
product_detail
Structured specs — package size, scent, use case, material — grouped into sections.
question_and_answer
Real shopper Q&A pairs that feed Google's AI Mode and conversational shopping directly.
related_product
Sets, required parts, accessories and substitutes — linked by GTIN or product ID.
document_link
Link spec sheets, safety data or instruction PDFs Google can surface for detailed questions.
custom_label_0 / 1
Your own free-text tags for campaign bidding groups, margin tiers or seasonal flags.
Fill in your Merchant Center supplemental data by just asking
Write product highlights and Q&A for my whole candle collection.
C
Pulled each product's real title and description, wrote 4–6 highlights and 3 Q&A pairs per candle — no prices, no guessed specs, same language as your store. 42 products ready to review.
C
Published. Your supplemental feed now sends product_highlight and question_and_answer for all 42 candles to Merchant Center.
Connect your account to Claude or ChatGPT and just ask, in plain language, for the fields you want filled in. It follows Google's character limits and formatting rules automatically, writes only from your real product data, and nothing goes live on the feed until you publish.