I recently reviewed a Shopify store that had moved over from another platform the previous September. The business owner came to me because sales had fallen off a cliff and nobody could tell her why.
The answer was in the traffic data. Organic search visits had been running at around 50,000 a month for most of the year before the move. After the migration, that number dropped to roughly 16,000. A loss of close to 70% of organic traffic, and it had not recovered on its own.
This was not bad luck. It was not a Google algorithm update. It was a migration that had not been planned properly, and the site had been paying for it every month since.
If you are considering a platform migration, or you have already done one and something feels off, here is what this case taught me. It is worth reading before you make a move, not after.
Redirects Are Not A Technicality. They Are The Whole Migration
When you change platforms, your URLs change. Category pages, product pages, filtered views, all of it. Every one of those old URLs needs to be mapped to its new equivalent with a proper redirect.
Skip this step, or do it partially, and here is what happens. Every visitor who clicks an old link, every backlink pointing at the old site, every page Google has indexed over years, all of it hits a dead end. Google has to work out from scratch whether your new pages are the same as your old ones. Often it decides they are not, and the rankings you built up simply disappear.
This is exactly what happened here. The old platform used a category and product URL structure that had nothing in common with the new one. Without a complete, carefully mapped redirect plan, Google effectively had to re-crawl and re-evaluate the entire site as if it were new. That is consistent with a traffic chart that shows a sharp, sustained drop starting the month after the migration went live.
Redirect mapping is not a line item to squeeze into the budget at the last minute. It should be one of the first things planned, not one of the last things checked.
Structured Data Does Not Move Itself
The other gap I see time and again is structured data, also known as schema markup. This is the code that helps search engines and AI tools understand what is actually on your page: your products, your prices, your FAQs, your reviews.
Modern Shopify themes generate some of this automatically the moment your products are set up correctly. Organisation details, basic product information, that sort of thing. It is useful, but it is the same foundation every Shopify store gets by default. It is not a strategy.
The content that actually needs deliberate structured data, like detailed FAQ sections written with real product expertise, rarely gets marked up properly during a rushed migration. That is a missed opportunity twice over. It affects how you show up in traditional search results, and increasingly it affects whether AI search tools like ChatGPT and Google's AI Overviews can find and use your content at all.
If your FAQ content is not marked up with the right schema, you are giving that visibility away for free.
An Audit Before You Migrate Is Cheaper Than A Recovery After
The business owner in this case did not have a pre-migration audit. Nobody mapped the existing URL structure, checked what was actually driving traffic, or planned the technical requirements before development started. The migration went ahead on cost, and the SEO consequences were dealt with afterwards, if at all.
That is the wrong order. A proper audit before migration tells you exactly what needs to be preserved: which pages carry the most value, which keywords you currently rank for, what technical signals need to survive the move. With that in hand, redirect mapping and technical planning become straightforward.
Without it, you are migrating blind and hoping nothing important gets lost. Based on what I see, something important almost always does.
Recovery Takes The Right Work, Not Just Time
A common assumption is that lost rankings will come back eventually, once Google settles down. Sometimes a small amount does return. But a drop of this scale, sustained for months, is not a temporary dip. It is a sign of underlying technical problems that need to be found and fixed directly.
The site in question had ranked well before. There was no reason it could not do so again. But getting there required identifying exactly what had gone wrong during the migration and correcting it in the right order, not waiting for time to fix a technical problem on its own.
The Real Lesson
A platform migration is not just a development project. It is a commercial decision with real revenue attached to it. Handled properly, it is a chance to fix long standing issues and build a stronger foundation. Handled without a plan, it can undo years of search visibility in a matter of weeks.
If you are planning a migration, or you have already moved and traffic has not recovered, get a proper audit done first. It will tell you exactly what happened and exactly what needs fixing, with no guesswork involved.
Get in touch through the form below and I will take a look at what is really going on with your site.