An SEO site migration is the process of moving a website while preserving its search engine rankings and organic traffic. For retailers, this means keeping an online store visible enough that customers can still find it after migration.
According to DataReportal, 32.4% of internet users discover brands via search platforms. With the right SEO migration strategy, you can maintain current rankings and boost organic traffic. For example, chocolate brand Rausch replatformed to Shopify and recorded a 26% increase in search visibility.
This guide outlines steps for a successful SEO site migration, with a migration SEO checklist to follow as you go.
What is an SEO site migration?
An SEO site migration is the process of moving a website while retaining its SEO performance. It involves managing redirects, preserving content and metadata, and maintaining technical SEO signals when moving a website to a new platform or domain or restructuring its URLs.
Many successful ecommerce retailers go through an SEO site migration process when they're replatforming, like moving to Shopify from other ecommerce platforms. Others migrate their site when changing their domain or restructuring URLs.
According to Shopify's Time to Value report, conducted with a leading consulting firm, brands migrating to Shopify implement 20% faster on average than competitors and report 15% incremental revenue from the direct benefits of replatforming.
"If managed correctly, your migration will not result in any traffic loss," says Carla Wright, solutions engineer lead at Shopify, who's helped lead the replatforming SEO strategies of brands like ColourPop, Quay, Kylie, and CR7. "That involves informing search bots of the new URL of every page and making as few changes as possible to both the content and the structure of your site."
Reasons for an SEO site migration
There are multiple possible reasons for an ecommerce brand to go through an SEO website migration, including:
- Replatforming: A slow, clunky commerce platform that can't handle your traffic or your business needs is a big reason to migrate your site. Gymshark, for example, outgrew their old platform, which crashed during the biggest shopping season of the year: Black Friday.
- Website redesign: Problems can arise if the site's navigation is confusing for users or search engines. A website redesign can improve the navigation and user experience (UX), but changes to URLs, page structure, or internal links require careful planning to preserve search rankings.
- Domain migration: Fast Growing Trees started out with the long URL FastGrowingTrees.com. Later, they acquired Trees.com and redirected their old URL to the new domain.
“Shopify's infrastructure allowed us to use the same app integrations, checkout, pixels, product catalog and website code between the old and new domains,” says Jordan Guggenheim, CTO at Trees.com. “This greatly derisked the migration and allowed us to focus our engineering efforts to ensure a seamless transition.”
Risks of an SEO migration
Each type of migration carries different SEO risks. Domain migrations require redirects and may call for a change of address in Google Search Console. Replatforming can affect URL structures and metadata, while redesigns can disrupt navigation and internal links.
- Poor user experience: Today’s customers expect seamless shopping experiences from online brands. Broken links arising from a site migration stop them in their tracks.
- Losing organic traffic: Search engines regularly crawl your site and index each page, evaluating signals such as content relevance, quality, and usability, including site speed. Migration-related changes to these elements can affect rankings, while technical problems can prevent pages from being indexed altogether. Temporary ranking fluctuation during recrawling and reindexing can occur.
- Lower conversion rates: In a 2026 Baymard study, some 19% of US online shoppers said they had abandoned a cart because they didn't trust the website with sensitive information. Another 17% cite website crashes or errors. A poorly managed migration can contribute to these technical issues.
SEO migration checklist (2027)
The most important part of any successful migration is having a solid plan.
Include these items in your SEO website migration checklist to prevent important tasks from slipping through the cracks, ensure stakeholders are updated, and minimize the impact on user experience:
| Step | Task | Why it matters for SEO | Phase |
|---|---|---|---|
| 1 | Back up your old site and metrics | Preserves a rollback option and baseline data for pre/post performance comparison | Pre-migration planning |
| 2 | Establish a communication plan | Prevents missed redirects, mistimed content updates, and siloed SEO tasks across teams | |
| 3 | Isolate the migration strategy | Limits variables so ranking changes can be diagnosed accurately post-launch | |
| 4 | Audit existing pages | Identifies outdated, redundant, or low-quality pages to improve or remove, while preserving valuable content | |
| 5 | Map redirects one to one | Transfers link equity to new URLs and prevents traffic loss from broken or chained redirects | |
| 6 | Track and fix 404 errors | Eliminates dead ends that harm user experience, increase bounce rates, and signal poor site health to crawlers | Launch day |
| 7 | Submit change of address in Search Console (domain moves only) | Tells Google to associate old domain signals with the new domain during the transfer period | |
| 8 | Submit new sitemap to Google Search Console | Helps Google discover new URLs and identify potential indexing issues | |
| 9 | Verify Google Analytics tracking and add launch annotations | Ensures accurate pre/post-migration data comparison and enables rapid identification of post-launch issues | |
| 10 | Monitor duplicate content and use canonical URLs | Prevents ranking dilution caused by search engines indexing multiple versions of the same page | Post-launch monitoring |
| 11 | Optimize Google Core Web Vitals | Migration-related template and script changes can degrade Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) scores, potentially affecting rankings | |
| 12 | Monitor and fine-tune SEO performance | Ongoing tracking catches ranking drops, redirect errors, and content gaps before they compound |
1. Back up your old site and metrics
Back up your old website before making any changes to your site structure or code.
Export Google Analytics 4 (GA4) data to use later to compare pre- and post-migration organic search traffic and conversions. Historical analytics data can help you understand which pages, categories, or campaigns drove the most value, informing URL mapping and content prioritization during the migration.
Combine your GA4 export with dated annotations marking key migration milestones. These provide context for changes in traffic and other performance metrics after launch.
Dev environments
You can use a staging environment to house the new changes and act as a safety net. That way, if there are major issues with the new site, you can reinstall the old version while you fix the bugs.
Keep staging stores password-protected or in private mode to prevent search engines from indexing them. If a staging site is publicly accessible, use no-index tags so search engine crawlers won't index the pages on your test site's URL. Remove indexing restrictions from the live site at launch.
2. Establish a communication plan
Different teams do different activities to support your website throughout the migration process. Product managers might make sure product descriptions migrate successfully, or make changes to them as needed. UX teams might verify that navigation, page layouts, and customer journeys remain intact.
Trees.com migrated with a communication plan that had a workstream for every department. Each one had:
- The actions
- An owner
- The expected timing
- Key performance indicators (KPIs)
Set a launch date and assign owners for redirect mapping, content and metadata freezes, technical deployment, and post-launch indexing checks. Establish deadlines and sign-off requirements for each task.
Think about implementing a content freeze throughout the process. This can prevent issues that arise post-migration, mistakes like your product team updating descriptions on your old site after the product information is already en route to the new version.
3. Isolate the website migration strategy
When you're doing an SEO migration, stick to one change at a time. For example, if you're migrating to a new ecommerce platform, keep your website's design, content, domain name, and metadata the same. It's important for testing site performance and improving your conversion rate optimization (CRO) strategy.
"If a merchant changes too many things during migration, it's hard to tell why the data points are changing," says Carla. “Only after you've completed your migration and have a benchmark on your new platform should you begin implementing changes to your content strategy."
If Google has been crawling your site for a while, a major overhaul will likely be noticed. This can lead to a reindex and a temporary fluctuation in organic traffic.
4. Audit existing pages
Large ecommerce websites often have thousands of pages. Review each one before migrating, and don't transfer any that are redundant or outdated.
Start with a content inventory that lists all your current site pages, including their site traffic and keyword rankings. This will help you decide which ones are worth migrating and which should be redirected. For example:
| Old URL | What to do |
|---|---|
| Product page for an item you no longer sell | 301 redirect to the closest replacement product |
| Landing page for an old sale that’s already ended | 301 redirect to an evergreen sale URL you use every year, such as /black-friday |
| Two near-identical collection pages (e.g., “Women’s t-shirts” and “Women’s tees”) | Merge into one page and 301 redirect the weaker collection page |
Combine this with a backlink inventory that records all external sites linking to your site, along with the pages they link to and the link authority. This helps you identify important backlinks and contact referring sites to request updates after migration.
5. Map redirects one to one
It's rare to simply switch ecommerce platforms while keeping the exact same URL structure across your site. Platforms like Shopify, for example, use a specific URL structure for product and category pages.
Carla always advises retailers to spend time on their redirect-mapping to ensure accuracy. This is where your list of current URLs comes in handy. Use it to match each old URL to a new URL.
Best practices for handling site crawl errors include:
- Using 301 (permanent) redirects
- Avoiding redirect chains
- Keeping redirects active for at least one year
- Updating internal links to final URLs
- Opting for one-to-one redirection. For example, avoid redirecting 100 product URLs to a collection. Instead, spend the time mapping each product URL to the same new page. You can manage this with bulk URL redirect imports on Shopify.
Here's an example of redirects from an ecommerce website that's replatforming. The old URLs are redirected to the default new URL structures to prevent 404 errors:
- website.com/clothing-category/shoes > website.com/collections/shoes
- website.com/white-blouse-size12 > website.com/products/white-blouse
- website.com/aboutus > website.com/pages/about-us
6. Track and fix 404 errors
More than a third of shopping sessions are still impacted by friction, Contentsquare’s 2026 study reports. Broken links, also known as 404 errors, are an example.
When shoppers land on these dead pages, their shopping experience is disrupted. They either go back to your homepage, hit the back button, manually search for the item they want to buy—or give up on your site altogether.
You can use Google Search Console's Page Indexing report to identify URLs returning 404 errors, and crawling tools like Screaming Frog can help uncover additional broken links.
If you find a URL that hasn't already been moved, create a redirection in your website's back end. Redirects help visitors reach the correct new URLs and signal to search engines that the pages have moved. Shopify’s redirect feature only works for these already-broken URLs.
This is a great time to optimize your 404 error page, if you haven't already done so. Baby brand Mori put up a 404 that apologized for the error and pointed shoppers to their core product categories:
7. Submit a change of address in Search Console (for domain moves only)
Submit a change of address in Google Search Console if you’re doing a domain migration. It tells the platform that your website has moved from one domain to another, and helps Google understand that URLs on your old domain should now be associated with the new one.
Note that this step is only required if you're changing domains. You don't use the Change of Address tool when:
- You're changing from HTTP to HTTPS (Google figures this out automatically)
- You're moving some pages but not others (use redirects instead)
- You're moving between www. and non-www. versions of the same domain (use canonical tags instead)
- You're moving a site without any user-visible URL changes
If your old domain has multiple verified versions in Google Search Console, including www and non-www, submit a separate change-of-address request for each applicable version.
Google’s Change of Address tool initiates a signal transfer period of ~180 days. Google recommends keeping permanent redirects in place for at least a year, and preferably longer.
8. Submit your sitemap to Google Search Console
After the launch of your website migration, verify the new property in Google Search Console and submit the new XML sitemap that Shopify automatically generates at yourstore.com/sitemap.xml. Google Search Console can help you monitor indexing and identify crawl errors after migration.
9. Verify Google Analytics tracking and add launch annotations
Make sure your new website is set up correctly in Google Analytics and Google Tag Manager for seamless data tracking. Use the real-time analytics report in Google Analytics to quickly see whether your website is getting traffic.
Don't panic if you're seeing a drop in organic traffic. This is normal as Google crawls and relearns your migrated website. Significant or sustained declines warrant investigation. Use:
- Google Search Console to monitor how Google is crawling and indexing your pages and to help you identify errors that can be corrected quickly.
- Google Analytics 4 to create an annotation on the day the new live site launches and validate key events (purchase, begin_checkout) in real time.
10. Monitor duplicate content and use canonical URLs
Watch for pages with duplicate content—the same words or images used across multiple URLs. Search engine algorithms don't know which URL is most relevant for the search term.
It’s not always possible to avoid some degree of duplication. In this case, canonical URLs signal to search engines which version of the content is preferred. "Canonicals basically say to Google, 'Hey, if there is more than one result, I want you to pick this one,'" says Carla.
On Shopify, canonicals are set by default to help manage any duplicate content that is created over time. They are still editable to accommodate advanced SEO strategies.
TLDs and subdomains
Using multiple top-level domains (TLDs) or subdomains requires clear signals to help search engines understand the relationship between localized versions of your site.
Hreflang (for international sites)
If you sell internationally, a hreflang tag tells search engines which version of a page to show to users based on their language or region.
For example, if you use example.com/en-us/product for American users and example.com/fr-fr/product for French audiences, an hreflang signals to Google which localized page to show. Search engines see multiple versions of the same page but understand they're intentional, not duplicate spam.
Shopify Markets helps brands sell internationally using localized domains or subfolders, currencies, and translated content. Merchants can configure automatic redirection based on customers' locations and browser languages, with translations managed separately through tools such as Shopify Translate & Adapt.
11. Optimize Core Web Vitals
Google Core Web Vitals (CWV) have largely become the standard website performance metrics for measuring UX, including for mobile sites.
A migration often involves changes to templates, scripts, images, or hosting providers, all of which can impact CWV and affect both user experiences and your site’s rankings, even if surface elements like redirects and backlinks are preserved.
Use Google PageSpeed Insights and Shopify’s web performance reports to track the following CWV metrics post-migration.
Shopify’s 2026 analysis proves the impact of each site-speed KPI on conversion:
| Core Web Vital | What it measures | Target | Conversion impact |
|---|---|---|---|
| Largest Contentful Paint (LCP) | The time it takes for the largest visible content element on the page to appear | ≤2500 milliseconds | 3.5% dip in conversions for every 100 millisecond delay |
| Interaction to Next Paint (INP) | The time between a user interaction (like a click or tap) and the next visible change on the screen | ≤200 milliseconds | 1.5% dip in conversions for every 32 millisecond delay |
| Cumulative Layout Shift (CLS) | Unexpected layout shifts during page load—for example, buttons, images, or banners that move around as content loads | ≤0.1 | No correlation identified |
Websites collect small snippets of data each time a page is loaded in a customer's browser. A tag management system like Google Tag Manager can centralize the management of tracking tags, though excessive or poorly configured tags can also slow page loads. Audit your tags during migration to remove unnecessary scripts.
Shopify stores have an inherent site-speed advantage: 8 in 10 Shopify stores pass all CWV thresholds, among the highest of any major ecommerce platform. V’s Barbershop, for example, recorded 30% faster site speed after replatforming.
12. Monitor and fine-tune SEO performance
Enterprise SEO audits should be an ongoing part of your ecommerce growth strategy. You'll need to keep the momentum going after you make the switch. Even if your site is performing well, it can always do better.
After migration, regularly monitor organic traffic, keyword rankings, and conversions to identify changes in performance. Use Google Search Console to track indexing issues, crawl errors, and search visibility, and compare results against your pre-migration benchmarks. Investigate significant or sustained declines to identify and resolve problems before they affect long-term SEO performance.
Retain SEO performance with a successful site migration
Although replatforming can be intimidating, consider the benefits of doing it right—notably improved SEO and the opportunity to clear any technical debt a legacy platform accumulated.
Experienced site-migration consultants can also support the transition of your content and ensure technical changes are well planned out. If you're unsure how to choose one, this ecommerce RFP template can help.
It might take a few months for organic traffic to stabilize, but you can improve SEO performance significantly after the switch, especially if you're replatforming from an outdated ecommerce platform to Shopify or Commerce Components by Shopify.
*Based on research commissioned by Shopify and published in October 2025. Results are averages from more than 300 organizations with GMVs ranging from $50 million to over $500 million, across seven competitor sets. The research covers migrations from May 2022 through June 2025.
Read more
- How To Recover Your Traffic After a Web Migration
- What Is Cloud Migration? Definition and Guide
- Understanding Enterprise Architecture: Benefits, Principles, and Best Practices
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- Assessing Ecommerce Scalability: What Kind of Platform Helps Growth?
- How to Navigate Website Maintenance Costs in 2026
- Navigate the Art of Migrating Customers to Shopify
- Ecommerce Replatforming and Migration Guide for 2026
- Why a Successful B2B Migration Requires More Than Just a New Platform
- 6 Challenges Forcing Brands to Explore Alternatives to BigCommerce
SEO site migration FAQ
How do you transfer SEO from one website to another?
Audit existing URLs and preserve valuable content and metadata. Redirect changed URLs to their relevant replacements, update internal links and canonical tags, and submit your new sitemap. For domain moves, also use Google Search Console’s Change of Address tool. Monitor indexing, organic traffic, and conversions after launch.
Does migrating a website affect SEO?
Yes, migrating a website affects SEO. Structural changes to your site cause search engines to recrawl and reindex your pages, which can temporarily impact current rankings and organic traffic. Ecommerce merchants that move platforms need a thorough SEO migration strategy to retain search performance.
Do you lose SEO if you change your domain?
Changing your domain can temporarily affect search rankings. Redirect changed URLs to the corresponding pages on your new domain, update internal links and canonical tags, and submit a Change of Address request in Google Search Console. Keep redirects active for at least a year.
How long does a site migration take to recover in search?
Recovery time after a site migration depends on your site’s size, how many URLs it has, and your server speed. Google says a medium-size website can take a few weeks, while larger sites take longer.
Consumer electronics brand Creality proved fast recovery times are possible with Shopify. Their SEO migration strategy covered redirects and retained structured data. They also implemented new technical optimizations that influenced a 30% increase in organic traffic across three key markets post-migration.
