SEO Migration: Guide to Preserving Rankings During Website Transitions

SEO migration is the process of making substantial changes to a website to maintain and improve its organic traffic performance. When executed correctly, it improves user experience, site performance, and security. 

There are different types of website migrations, which come with varying risk levels. Usually, migrations are done for one or more of the following reasons: 

• Domain changes – When an old domain name is moved to a new domain name (high risk) 
• HTTPS transitions – When shifting from HTTP to HTTPS for added security (low to moderate risk)
• Content management system (CMS) migrations – When building or redesigning a website and switching between platforms (e.g., from Shopify to WordPress) (moderate to high risk)
• Hosting changes – Moving to either a new server or infrastructure (low to moderate risk)

Website migrations often lead to ranking losses, traffic drops, and revenue declines due to the lack of planning, execution, and monitoring. That’s why we’ve prepared this comprehensive guide. 

It’s designed to help business owners, marketers, developers, and SEO professionals execute a smooth SEO migration.

Key Phases of SEO Migration

We’ve determined two main key phases for a stress-free SEO migration. These phases include planning and strategy development, pre-migration preparation, implementation, testing and quality assurance, to post-migration monitoring and ongoing optimization. 

Each phase has a framework to manage the tasks and the team involved. 

Phase 1 – Pre-Migration Planning

In the pre-migration phase, we clearly define the goals, key stakeholders, and SEO tools needed. 

We’ve created examples of primary goals for reference, but what’s important is aligning goals with your business objectives to minimize risks. Some common objectives may include:

• Improve SEO performance, such as site structure or fixing any technical SEO issues
• Enhance user experience, including improving site navigation, mobile-friendliness, and page speed
• Implementing security upgrades (e.g., HTTPS) to strengthen data protection and meet compliance with industry security standards
• Rebrand or domain change to still maintain authority and trust with users and search engines   

Establishing these objectives helps you gather the key stakeholders—those team members who will drive the SEO migration forward. Each team brings a clear role and a set of responsibilities, which creates a better collaboration and communication, minimizing errors. 

In most cases, an SEO migration team involves one or more of the following roles:

• Developers implement technical changes, manage redirects, and ensure proper server configurations
• SEO specialists oversee URL mapping, redirect strategies, content preservation, and monitoring of post-migration performance
• Designers maintain user experience and accessibility while making sure the new design aligns with SEO best practices
• Content managers transfer the high-performing content correctly and are careful not to create duplicate pages
• Project managers move the project forward and coordinate key deliverables between teams so all phases of migration stay on track

Lastly, in your pre-migration phase,  gather the set of SEO tools you’ll need to audit, analyze performance, and create a benchmark for key performance indicators (KPIs). Some KPIs examples include organic traffic, keyword rankings, backlink profile, conversion rates, and crawl errors and indexation. 

Phase 2 – Technical Preparation

During phase 2, the focus is on the technical side of your website, which involves auditing the existing site, redirect mapping creation, and backing up all critical data for reference.

Why complete an audit during a prep stage? 

Performing an audit of the existing site allows you to analyze how it’s performing and helps you identify your high-performing pages and potential issues. It’s also recommended to download your existing keyword rankings to compare performance before and after the migration, identify any traffic or ranking fluctuations, and troubleshoot potential issues.

Once you’ve completed your audit, the next step is to create a redirect map—a structured plan document (Excel/CSV) to ensure old URLs are correctly redirected to their new URL. We must reintegrate that all old URL should have their own counterparts in the new target site.

With this document in hand, your team can set up proper 301 redirects, which we provide further details on in the ‘Redirect Implementation’ section below. In short, 301 redirects ensure your SEO equity is passed. 

Even with the best of layout plans, SEO migrations may come with unexpected challenges. That’s why backing up all critical data is imperative before migration—it creates a safety net giving you peace of mind. 

Here’s an example of what to backup:

• Website files and databases: Preserve all content, media files, meta data, and customer data
• Current website structure: Keep a copy of the sitemap and URL structure
• SEO data and rankings: Download keyword rankings, traffic reports, and backlink data to track changes post-migration 
• Configuration files: Backup CMS settings, robots.txt, .htaccess files, and plugins to prevent misconfigurations

You can store backup data in a secure cloud storage, using UpdraftPlus for WordPress, a local server or external hard drives, or in a web hosting provider’s backup feature. 

Tools and Resources for SEO Migration

Essential Software Stack

We’ve gathered a handy resource list of tools and resources to use during your SEO migration. 

• Google Analytics: Track website traffic sources, user behaviour, conversion data, and identify high-traffic pages
• Google Search Console: A must-have tool since it provides website data directly from Google’s indexing and search results. In your audit, use it to identify crawl errors and fix indexing issues, track keyword performance, check for mobile-friendliness, analyze (and disavow harmful) backlinks, pages blocked by robots.txt, or canonicalization issues that should be fixed pre-migration
• Tools like SEMrush or Ahrefs: Use it to gain insights into your website backlinks, keyword research, and technical SEO issues that affect your rankings, like broken links, missing alt text, and duplicate content
• Search engine crawlers like Screaming Frog and Lumar (formerly DeepCrawl): Use these to complete a full crawl of your site

Critical Pre-Migration Tasks

Let’s get into further details of your pre-migration tasks with a website migration checklist, with an emphasis on site structure analysis, SEO audit, and speed optimization. Each item will help you ensure everything is ready before going live with the new website set up.

Technical Audit Checklist

Here’s an extensive SEO checklist to help you with the site structure analysis. The purpose is to ensure the new target website is easy to navigate for both visitors and search engines. 

• • Website structure: Define main and sub-categories
  • Website navigation: Navigational structure and the URLs

• XML sitemap to provide a clear roadmap of the website structure

• • Robots.txt rules to manage site crawling
  • Redirects to define the strategy and rules
  • 404/Status codes to deal with any broken pages and any outdated products/services
  • Website hosting along with security certificates

• URL structure

• Page titles and meta descriptions to validate on-page SEO elements and ensure they are correctly transferred and optimised
• CMS with SEO functionality requirements
• Page Speed Insights for reports of the user experience of a page and ways to improve it
• Core Web Vitals to ensure the site follows best practices and its mobile responsiveness 
• Image optimisation to ensure correct formatting and loading times
• Video optimisation to consider self-hosting or YouTube
• Internal linking strategy to ensure equity flow
• Rel-canonical to prevent duplicate content issues by maintaining proper canonicalization
• International testing, such as hreflang and international targeting
• Schema Markup – Verify structured data is correctly implemented for rich search results
• Tracking data to migrate analytics and tag management
• Crawl Report – Identify and fix crawl errors using Google Search Console 

Staging Environment Setup

A staging environment is a replica or a mirror production site where you can set up and test your new target website. Because it’s a controlled space, the team can use it to test for errors and optimize for performance before the migration to the live environment.

When setting this up, we recommend adding a noindex tag to every page on the staging site. It’ll prevent search engines from indexing it and causing duplicate content issues down the line. 

Replicating the live site in a staging environment allows your teams to do many things, including:

• Testing the design, structure, and functionalities without affecting users
• Identifying and fixing technical issues before deployment
• Ensuring all redirects and SEO elements are properly configured
• Check heading structure and layout
• Validating 301/302 redirects and ensuring there are no 404 errors before launching

Redirect validation ensures that the current website’s SEO equity is preserved and users are seamlessly directed to the correct pages. Here are key steps to take:

• Implement 301 redirects for permanent URL changes
• Use 410 status codes for permanently removed content
• Run a post-migration crawl on the old site to verify that URLs are correctly redirected
• Fix any 404 errors to maintain a smooth user experience

Now, we’re getting closer to the live SEO migration execution, but before launching, test the website’s functionality across various browsers and devices to ensure cross-platform compatibility.

Here’s a preliminary checklist for launch day:

• Test the site to confirm it renders correctly on Chrome, Firefox, Safari, and Edge
• Check that mobile and tablet responsiveness is fully optimized
• Key interactive elements, such as forms and navigation, function properly
• Test search engine crawling: Is Robots.txt set up correctly? Are there any unintentional noindex tags? Any cloaking issues? Are canonicals implemented? Desktop and mobile response correctly?
• Google Search Console actions: Did you request indexing in the URL inspection for new or important pages? Did you check blocked resources on key pages? For international targeting, was the targeted country selected? Did you submit the sitemap (more on that below)? 
• Full site crawl: Did you perform a full site crawl to spot any internal linking errors or 404 pages? Has content migrated correctly?

When addressing these pre-migration tasks, you reduce risks and set the foundation before launching your live SEO migration.

Execution and Go-Live Strategies

The timeframe to get from the pre-migration phases to launch day will depend on how complex the migration is, the size of the website, and how thoroughly it’s tested. It could range between weeks or months. 

To minimize the timeframe, we’ve prepared some go-live strategies, including launch day best practices and redirect implementation.

Launch Day Best Practices

There are three key best practices that we recommend: low-traffic timing, incremental rollout, and post-launch monitoring. 

We advise scheduling the migration during off-peak hours when the site traffic is at its lowest. It’ll minimize disruptions and allows your team to address any immediate technical issues without impacting users.

Another strategy is to consider an incremental rollout where you deploy updates in phases instead of launching the entire site at once. It allows you to closely monitor and make quick adjustments, if issues come up.

No matter how you decide to proceed, immediately track the site performance after launching to detect errors that could impact website rankings. Here are a few items you can immediately perform:

• Conduct a new SEO audit to check for crawlability and indexability
• Use Google Search Console to monitor crawl errors and indexing status
• Track traffic and ranking changes with Google Analytics and Ahrefs

Redirect Implementation

During the pre-migration tasks above, we recommended creating a redirect map to identify old URLs. Each legacy URL should be paired with a new URL counterpart to ensure users and search engines arrive at the most relevant page.

This is the first step of enforcing 301 redirects to preserve SEO value. The best practice is to implement 301 redirects at the server level, either through .htaccess for Apache or via server-side code for other web servers. This is typically a task for your development team. 

If your website has a large library of URLs to redirect, it’s important to test them using tools like Google Search Console to make sure they’re functioning correctly and there are no duplicates. 

To prevent these issues, implement canonical tags on duplicate pages, pointing to the preferred version. It’ll help ensure that search engines understand which page to index and avoid penalties.

Lastly, after your SEO migration, update and submit the new XML sitemap to search engines. Here’s how:

• Go to your Google Search Console and select the correct property
• On the left-hand side bar, go to Indexing > Sitemaps
• In the ‘Add a new sitemap’ section, enter the URL of your new sitemap and submit

Doing so ensures that Google is aware of your website’s new structure and helps with quicker and more accurate indexing of the pages. It’s also a good idea to monitor the Sitemaps section for any errors or issues that may pop up after submission.

Post-Migration Monitoring and Recovery

After your SEO website migration, the work doesn’t stop with the switch over. Ongoing monitoring ensures the website maintains its performance, ranking, and user experience. In this phase, monitor and resolve potential issues, track key metrics, and perform regular optimization to recover any lost ground from the migration. 

Performance Tracking

The first step is to compare pre- and post-migration metrics using Ahrefs to get insights into any significant drops or improvements. That’s why performing a pre-migration SEO audit and setting up your KPIs is a not-to-miss step. Here’s what to track and ask yourself:

• Organic traffic levels: Are your visitors from search engines consistent with pre-migration levels?
• Keyword rankings: Did your keyword rankings shift after migration? Identify any worrying changes in ranking.
• Top landing pages: Track the high-performing pages, are they maintaining their ranking and organic traffic levels?

Use this data to compare against the historical data before migration to determine any changes and identify potential performance gaps.

Note that the user experience is also directly linked to SEO performance. After migration, conduct a user experience audit to evaluate the following:

• Engagement rates: A drop in engagement rate may indicate navigation challenges, content issues, or slow page load times.
• Engagement metrics: Analyze key engagement signals such as average engagement time per session, engaged sessions per user, and event interactions to understand how users interact with your site.
• Conversion Tracking: Ensure that conversion events are properly set up and tracking correctly after migration. If conversion rates have declined, investigate potential issues like broken event tracking, slow loading times, or ineffective call-to-action placements.

Lastly, perform a full crawl after migration so you can address any broken links or 404 pages. In a nutshell, identify issues, such as:

• Missing or uncrawlable URLs: Make sure all the URLs are mapped correctly and accessible to search engines
• Block URLs: Check for unintentionally blocked URLs in the robots.txt file or with noindex tag
• Redirect hops: Ensure redirects are set up properly and avoid chains that slow down crawling efficiency.

• Number of live URLs: It should match the redirect map document, ensure URLs are accounted for in the new website.
• Missing tags: See if there are any missing meta tags like title tags, description tags, and heading tags.

Run regular crawls and address any new issues immediately to avoid long-term damage to your site’s rankings.

Long-Term SEO Maintenance

SEO work is never truly “done” after an SEO migration. Continue to monitor and optimise by keeping content fresh, perform backlink reclamation, and continuous optimization.

Here are some ways to keep content fresh:

• Refresh outdated information on older blog posts or landing pages (see our post-migration monitoring and recovery section above)
• Optimize for new keywords and search intent that may have gained relevance or search volume since the migration
• Improve content quality by adding new sections, enhancing readability, and using multimedia.
• Ensure internal links are correct after updating content

A common issue after a migration is losing valuable backlinks. If URLs change during migration, backlinks pointing to old pages may become dead links, which can cause a drop in site authority and overall SEO performance.

Here’s how to recover lost link equity:

• Reach out to webmasters of external sites and ask them to update their links to point to the new URLs. 
• Use 301 redirects to guide users and search engines from old URLs to the new pages. 

SEO is an ongoing process, so regularly audit your site to continue to fix SEO technical issues, content gaps, keyword performance, and stay up to date with Google’s latest guidelines.

Common Pitfalls and Solutions

Avoiding SEO Migration Mistakes

We’ve gathered some of the common pitfalls to avoid SEO migration mistakes.

• We can’t say this enough, but don’t neglect redirects. Otherwise, you risk having orphaned pages and losing SEO equity due to poor redirect planning
• Create proper communication channels between team members to mitigate issues
• Complete sufficient testing to avoid as many problems after the live rollout

Case Studies and Lessons Learned

At Asset Digital Communications, we’ve worked with a top leading HR firm in Canada during a website SEO Migration We quickly identified a potential threat the firm wasn’t aware of in its search rankings and traffic. 

Here’s a list of tasks we completed before and after website migration: 

• Conducted a full SEO audit 
• Mapped old URLs to new ones and implemented 301 redirects to preserve rankings 
• Optimized metadata, improved site speed, and ensured mobile-friendliness
• Post-migration, we closely monitored performance and quickly resolved indexing issues 

Within three months, organic traffic increased by 35%, and rankings improved, solidifying the HR firm’s online presence and driving their long-term business growth after rebranding.

SEO Migration FAQs

How Long Does Recovery Take?

Recovery typically takes between 2 to 6 weeks for rankings to stabilize after a migration. It depends on certain factors, including quality of redirects, content relevance, and how well the site is optimized for SEO.

Is HTTPS Migration Risky?

Yes, HTTPS migration is risky if done incorrectly and may lead to mixed content issues, broken links, and SEO setbacks. To minimize these risks, force HTTPS via the .htaccess file, update canonical tags, and ensure all internal links are properly updated.

At Asset Digital Communications, we have a team of experts to ensure a smooth and successful SEO migration. Let us assist and help safeguard your website performance, contact us today to get started.