What Happens to My Meta Tags When I Change My Shopify Theme?

Your per-page Page title and Meta description are stored in Shopify's admin, not the theme, so they carry over to a new theme through the page_title and page_description Liquid objects. What does NOT carry over is anything baked into theme code: custom title-tag edits in theme.liquid, JSON-LD structured data, Open Graph/social tags, and SEO apps that render through a theme app embed all reset to the new theme's defaults. There is no native undo for the old theme's rendered output, so missing structured data or a changed title format will not roll back on its own.

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

Before publishing the new theme, list where SEO lives in theme code: custom edits in theme.liquid, hard-coded meta/OG tags, JSON-LD blocks, and any SEO app that injects via a theme app embed. Preview the new theme and View Source on a product and a collection to see what is missing.
After switching, run your key URLs through Google's Rich Results Test and Search Console URL Inspection to confirm titles and Product/Article structured data still render; re-enable the SEO app's theme app embed in the new theme if its tags vanished.
Your native SEO fields are safe in a Products CSV export (SEO Title/Description, Image Alt Text) - keep one. And don't delete the old theme: it stays in your Theme library, so you can View Source on its preview to copy back any custom head code you lost.
Take a dated snapshot of all SEO fields right before you publish the new theme, so you can diff before-vs-after and restore any field that changed in one click. SEO Vault keeps a daily backup of every SEO field across products and collections for exactly this kind of switch.

Source: Shopify Help Center: Changing your theme; Shopify.dev: Add SEO metadata to your theme (page_title and page_description objects)

Related fixes

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SEO Vault keeps a daily snapshot of every SEO field on your store — meta titles, descriptions, alt-text, tags, handles (products AND collections) — and emails you the moment something changes in bulk, with the likely app responsible. One click restores yesterday's state, just the SEO fields. Free to monitor and get alerted; $14/mo for 1-click restore.

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