How to fill Metafileds in Bulk or based on a specific collection?

Store Design
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Topic summary

  • Bulk-fill a simple single-line text metafield/metaobject across products.

  • Context: ~300 jewelry products (sold as pairs and singles) need the value added.

  • Constraint: Wants to avoid editing each product individually and not use the Shopify bulk editor.

  • Question: Can collections be leveraged to populate or assign metafield values automatically?

  • Status: Open; no solution or method confirmed yet.

Summarized with AI on January 19. AI used: gpt-5.
1

Hey, I sell jewelry in Pairs and Single, I have added a metafield/metaobject on my shop.
It’s a simple one text line.
Now I want to add this to my products but I have over 300 products in my shop.
Is there a chance to fill in my metafields without to edit every single product or using the bulk editor?

I was thinking about to work with my collections. Is it possible?

Thank you so much for your help.