Plug In SEO Changed My Meta Titles on Shopify — How to See What Changed and Undo It
Plug In SEO lets you build meta-title templates and apply them across your catalog in one bulk fix, which replaces the titles you wrote by hand with its templated version — often on hundreds of products in a single pass. Those titles are stored as Shopify SEO metafields with no version history, so there's no native undo and no record of what each title said before the run. That's why one bulk fix can quietly flatten weeks of hand-tuned titles with nothing obvious to roll back to.
Step by step
Confirm it was the bulk fix and see how far it spread. In Plug In SEO, open the bulk optimize / meta-title template area and check whether a title pattern was applied across products — that template is what overwrites hand-written titles. Then open a few products in Shopify admin under 'Edit website SEO' (Search engine listing) and compare the current page title to what you intended. Note whether collections got hit too, not just products.
Turn off the title template before you fix anything. In Plug In SEO, disable the meta-title template / auto-optimize rule for products (and collections) — if you leave it on, your corrections get wiped again the next time a bulk fix runs. Fix the field first, source second; otherwise you'll be redoing the same work twice.
Recover the originals from wherever a copy still exists. Re-import the SEO Title column from a pre-change CSV export (Matrixify maps it to the global.title_tag metafield), or copy the old titles Google still shows in live search results — they lag a recrawl by a few days, so grab them before they update. Search Console > Performance, filtered to a page, also shows the title that was ranking. Where nothing survives, rewrite your highest-traffic products first (check Search Console > Pages), then request re-indexing of just those URLs.
Going forward, keep a daily snapshot of every meta title — products and collections — so a single Plug In SEO bulk fix is flagged the day it happens, with the app that changed them named, and yesterday's titles restore in one click instead of a manual rebuild.
Source: Plug In SEO app listing (bulk SEO editing / meta-title templates); Shopify Help Center: editing search engine listings
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.