Online store migration without losing traffic: an SEO checklist.

Changing your store platform, domain or URL structure is the moment when it is easiest to lose Google traffic built up over years. I have worked on projects like this in large e-commerce, and each time I saw the same thing: preparation decides the outcome, not launch day itself. Here is a checklist you can work through point by point.

Why stores lose traffic after a migration

Google knows your store under specific URLs. When they change, it has to find the new pages, understand that they replace the old ones and transfer the signals they earned. Traffic usually drops when:

• old URLs return a 404 instead of a redirect,
• redirects point to the homepage or unrelated categories,
• new templates lose content, headings, structured data or internal links,
• the staging version gets indexed, or production launches with indexing blocked,
• nobody monitors Search Console during the first weeks.

Before the migration: URL map and staging

1List of old URLsSitemaps, server logs, analytics, Search Console and a platform exportFoundation

2Redirect mapEvery important old URL assigned to its most similar new oneCritical

3Staging reviewContent, templates, structured data, links, speedControl

4BaselineRecord of traffic, rankings and indexed pages before launchMeasurement

1. Collect all old URLs. Not just those in the sitemap. Google recommends also using server logs, analytics and your store system. In stores it often turns out that traffic comes from URLs nobody remembered.
2. Prepare the redirect map. Category to category, product to product. Removed products to a successor or the closest category. Avoid redirect chains: each old URL should lead straight to its final destination.
3. Review staging. Do key categories keep the same content and headings, does product structured data work, do internal links point to new URLs, do filters avoid generating thousands of new duplicates? Staging must not be accessible to Google.
4. Record a baseline. Organic traffic, rankings for key queries and the number of indexed pages before the migration. Without it, it is hard to judge what changed after launch.

Launch day: redirects and sitemaps

MistakeEverything to the homepageBulk-redirecting old URLs to the homepage loses signals and frustrates customers arriving from links and bookmarks.

RightURL to its equivalentPermanent server-side 301 or 308 redirects from every important URL to its closest equivalent.

• Switch on 301 or 308 redirects according to the map and check a sample of key URLs right after launch.
• Remove staging blocks: noindex, password protection, robots.txt disallow. A common and very costly mistake.
• Update URLs in canonicals, hreflang and internal links so they do not point to redirects.
• Submit the new sitemap in Search Console. Keep the old one during the move so you can track how Google switches to the new URLs.
• If you change domain, use the Change of Address tool in Search Console for the old domain.

After the migration: what to monitor in the first weeks

Google warns that rankings may fluctuate temporarily during a move, and that larger sites take longer to switch over. So in the first weeks, check regularly:

• indexing reports in Search Console: are new URLs getting indexed, and is the number of 404 errors stable,
• server logs: is Googlebot crawling new URLs without hitting errors,
• traffic and conversions in GA4 for key categories and products, compared with your baseline,
• rankings for the most important queries, keeping in mind that short-term fluctuations are normal.

Keep redirects for as long as possible. Google recommends at least a year, and ideally they stay permanently.

The most common store migration mistakes

• No redirects for products and categories with external links.
• Changing URLs, content and templates all at once, with no way to tell the impact of each change.
• Launching at the peak of the sales season.
• Filters on the new platform generating new duplicates. More on that in faceted navigation and SEO.
• Nobody responsible for monitoring after launch.

If you are planning a platform change, start with an SEO audit before design decisions are made. To see how I work with stores, visit e-commerce SEO.