In one sentence
Metafields are custom fields in Shopify that store extra product details, like materials, fit or care instructions, so you can show them on product pages and share them with search engines and AI.
How metafields work in an online store
Every product comes with standard fields: title, description, price, images. Metafields let you add your own, like "Heel drop", "Fabric weight" or "Compatible with".
You create a metafield definition once, choose its type (text, number, a list, a measurement), then fill it in for each product. Your theme can then display it on the page, in the same spot on every product.
Metafields vs. product descriptions: where details should live
Why metafields matter for AI visibility
Shopper questions are full of specifics: "waterproof", "for wide feet", "under 2 pounds". AI assistants can only match you to those questions if the facts are written somewhere they can read.
Metafields turn those facts into clean, consistent labels. Shown on the page and passed into your product feed and schema markup, they give AI the details it needs to recommend the right product.
How to set up metafields for your products
- List the specs shoppers ask about before buying. Your reviews and support inbox are the best source.
- Create a metafield definition for each one in your store settings, with the right type.
- Fill them in for your bestsellers first, then the rest of the catalog.
- Add them to your product page template so shoppers and crawlers can see them.
- Map them into your product feed and structured data.
Metafields FAQs
Do I need an app to use Shopify metafields?
No. You can create and fill metafields in Shopify's settings under custom data. Apps help with bulk editing large catalogs.
What's the difference between metafields and metaobjects?
A metafield adds one detail to one product. A metaobject is a reusable block of content, like a size chart or ingredient profile, that you can attach to many products.
Do AI assistants read metafields?
Only if they appear somewhere AI can see: on the product page, in structured data or in your product feed. A metafield that's filled in but never displayed stays hidden.
About the author
Jenn Starr, Co-founder, Selix
Jenn has spent 20+ years helping SaaS startups build their marketing and implementation playbooks. She has bootstrapped three marketing agencies and is a 500 Startups alum. At Selix, she leads the work of getting ecommerce brands named in AI answers.
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