A newly installed app changed your SEO fields, injected schema, or altered handles, and your rankings slid. Because Shopify has no version history for SEO fields, it's hard to even see what changed.
If you didn't already have a backup, those old values are gone โ 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 โ and SEO Vault only reads your store unless you click restore.
Protect my SEO free โ never lose it again โSource: Shopify Community technical-SEO threads
Never lose your SEO to an app again
SEO Vault keeps a daily snapshot of every SEO field on your store โ meta titles, descriptions, alt-text, tags, handles (products AND collections) โ 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.
Protect my SEO โ free โ