Shopify rankings dropped after a theme change — what to check and recover

A new theme can change heading structure, alter or remove schema markup, and shift internal linking — all of which affect SEO. Combined with any handle or metafield changes during migration, rankings can slide.

If you didn't already have a backup, those old values are gone — Shopify keeps no history.

The steps below recover what you can. To make the next time a 1-click undo instead of hours of CSV work: a daily snapshot of every SEO field. Free to monitor, no card — and SEO Vault only reads your store unless you click restore.

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Step by step

Compare the new theme's headings (H1/H2) and structured data against the old one — themes often drop or change product/breadcrumb schema.
Verify meta titles, descriptions and alt-text survived the migration; restore any that were blanked from a snapshot.
Check for new 404s from changed handles and add redirects.
Keep a daily snapshot of SEO fields across theme changes so you can prove and revert exactly what moved.

Source: Shopify Community: theme migration / SEO threads

Related fixes

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