Slowdowns under higher traffic and rising bounce rates aren’t the growing pains of a scaling site. These are signs your current CMS has problems keeping up. Left unchecked, issues like that can lower your position in Google search results, so instead of waiting for things to get better, consider a CMS migration.
Done right, CMS migration can improve load times, workflows, and user experience, which turn casual visitors into returning customers. But how can you migrate to a more powerful CMS without losing valuable content, SEO rankings, or site traffic?
This is what we’ll look into today. Before we start, let’s have a look at what exactly a Content Management System migration is.
What is CMS Migration
A CMS (Content Management System) migration involves transferring all content, data, and functionality from one CMS to another. A successful migration requires thorough preparation and precise scheduling, similar to a well-executed military operation.
The most important parts of CMS migration are:
Moving existing content and comments
Transferring files and images
Managing user accounts
Mapping the site’s structure and URLs to preserve functionality and SEO rankings
Each must be handled with care and involve SEO specialists, web developers, designers, and analysts.
Reasons for CMS Integration
Each company has different reasons for a CMS switch. For example, Localcoin migrated its CMS from WordPress to boost site performance and strengthen security. As a result, they saw significant improvements in site speed, user engagement, and overall functionality.
Localcoin
Migrating WordPress Website to Jamstack for the financial technology company.
Commonly, businesses decide to change their content management system because:
It can enhance the speed and functionality of your website.
Switching to a new CMS platform lets the website adopt advanced features to meet growing business needs.
Newer CMS platforms often come with stronger security features, which can better protect the website from vulnerabilities and cyber threats.
It’s an opportunity to revamp the design and branding so it better aligns with your current marketing goals.
Switching from the old CMS can preserve your existing traffic and maintain or even improve your search engine visibility.
Risks of CMS Migration
Like any major operation, a CMS migration comes with potential issues that CTOs should be aware of.
Broken URL mapping is one of the most common risks in CMS migrations. This can negatively impact SEO, user experience, and site navigation. Relinking and proper URL mapping should be prioritized to maintain your website’s search engine rankings and user journey.
Maintaining consistent traffic and a stable SEO position is critical for digital businesses. A poorly handled migration can result in a drop in search rankings. Seek the help of experienced developers or an SEO agency to ensure that best practices are followed during the transition.
There’s always a risk of losing valuable content such as blog posts, user comments, or data during migration. Use a reliable method of data transfer that is compatible with the CMS you are migrating to.
Traditional CMS vs Headless CMS – Which One To Choose?
While picking a CMS to transition to, you might wonder about the right CMS for your content migration: traditional or headless.
Traditional CMS platforms like WordPress or Drupal are monolithic systems that combine both the back-end, where content is created and managed, with the front-end, where content is displayed.
These systems are user-friendly for non-technical users, providing built-in templates and WYSIWYG (what you see is what you get) editors, making it easy to build and manage websites. Tight integration between front-end and back-end can limit flexibility and scalability, as it restricts customization options and the ability to adopt new technologies.
A headless CMS separates the back-end content management from the front-end presentation layer. Content is stored in the back-end and delivered via APIs to any front-end, such as a website, mobile app, or IoT device.
Decoupling allows developers to use any technology or framework for the front-end, offering more flexibility, scalability, and control. It’s ideal for organizations that need to distribute content across multiple platforms, offering a more modern and dynamic content delivery approach. It requires more technical expertise to implement and manage, making it better suited for development teams with coding skills and complex, multi-channel content strategies.
CMS Migration Checklist
Plan a CMS Migration
A CMS migration is a complex operation, not only involving the transfer of content but also incorporating necessary optimizations to improve site performance. Each element of your site needs careful attention, as migrating to a new CMS can impact both how your content is structured and how it is presented. Therefore, it’s crucial to familiarize yourself with the new platform early on to guarantee a transition without any issues.
A common challenge during CMS migration is involving SEO specialists too late, which can lead to preventable issues like traffic loss or SEO damage. To ensure a smooth transition, you need a migration plan with assigned responsibilities and the right tools.
Define Roles and Responsibilities
Before starting, remember that migration can temporarily affect site traffic. While this impact isn’t permanent, your site’s performance before and after migration may differ. By following best practices, you can minimize any negative effects. This makes detailed planning essential.
A project manager should assess how the migration could potentially impact the site, considering each element that will be altered during the process. Even small changes can influence your search rankings, so these details must be carefully documented. If you’re outsourcing parts of the migration to a web developer, clearly communicate these aspects. Once your team is assembled, assign specific roles and tasks. Each member should understand their responsibilities clearly, ensuring an organized and efficient migration.
Timing and Traffic Considerations
Knowing the periods of lowest traffic on your site can help reduce disruptions during the migration. These optimal hours will vary based on your industry, business operations, and geographic region. Use tools like Google Analytics to determine the best time of day to carry out the process, minimizing the effect on users and potential traffic loss.
Questions to Ask Your Team
Are authentication, access roles, and user permissions defined?
Is the new setup aligned with compliance requirements (GDPR, data handling, retention)?
Has dependency and plugin vulnerability risk been audited?
Is there a plan for ongoing security monitoring?
Pre-launch Preparation
The first step in pre-launch preparation is analyzing both the current state of your website and the staging environment. The staging environment is the test site where web developers work, and it requires password protection to prevent unauthorized access and keep the test version hidden from search engine bots.
Backup and Data Crawling
Before migration, be sure to back up all existing data and perform a crawl of the current website. Tools like Screaming Frog can gather detailed information about your site’s structure and content, which will help compare the old and new versions after migration is done. Organize this data by keeping old and new versions in separate, clearly labeled folders.
Source: Screaming Frog
Exporting Important Data
When exporting important data for a website migration, create a list of all subpages that receive external links. 404 errors on these pages post-migration can negatively impact SEO and harm organic traffic, so use tools like Ahrefs to track these links. Ahrefs can also be used to generate a list of subpages shared on social media, since they’re valuable for user engagement and should be maintained in the new website structure.
Source: Ahrefs
Creating a URL Redirect Map
To prevent broken links and loss of “link juice”, you need a detailed URL redirect map. It should track every existing URL and match it with its corresponding new address. Properly mapping these redirects ensures that your SEO is preserved, and your web developers can implement the changes without any issues.
Backup of the Old Website
Creating a complete backup of the old version of your will allow you to recover any lost data or resolve unexpected issues, like broken sections or missing content, during the migration process.
Questions to Ask Your Team
Have they fully mapped the existing CMS setup, including plugins, integrations, and content types?
Are potential risks (SEO, redirects, dependency gaps, legacy code) documented?
Is the migration approach incremental or a full rebuild?
Do they have a content and URL inventory to avoid content loss?
Conducting a Technical SEO Audit
SEO audit should verify that the new website’s structure, content, and SEO elements are properly implemented to avoid any negative impact on your rankings.
Learn Squared serves as a great example of the importance of performing a thorough technical SEO audit during migration. Making sure all SEO elements were correctly implemented, they managed to maintain their SEO rankings and avoid any disruptions, resulting in a smooth transition with no loss of traffic.
Learn Squared
Migrating an outdated e-learning platform from Drupal to Jamstack
A robots.txt file generated for the new site should include the correct exclusions, and create a sitemap that organizes your content into categories like blog posts, images, and videos for the search engines that index your site.
LLM.txt
Since AI crawling is becoming standard, companies should include a llms.txt file. It guides AI models on how content should be used, which improves answer visibility in tools like Perplexity, ChatGPT, or Google’s AI Overviews.
A good llms.txt should include:
Title
About Us / Brand description
Key resources or critical pages
Contact details
Optional: Usage instructions
Structured Data
Schema markup helps search engines and AI models better understand the content structure and other metadata. If the migration drops schema or uses outdated formats, rankings, and AI visibility can suffer.
Make sure the important schema types (FAQ, HowTo, Article, Product, Organization) are present and valid. You can always use tools like Google Rich Results Test to validate your data structure.
Checking for Broken Links
Perform a crawl of the new website to identify any broken links that could result in 404 errors. Fixing these errors before launch is essential to maintaining traffic flow and ensuring that both internal and external links work properly.
Canonical Links
Canonical links prevent duplicate content and help you concentrate SEO value on your most important pages, strengthening your site’s overall SEO strategy. Make sure they’re set up correctly.
Questions to Ask Your Team
Has the team validated sitemap.xml, robots.txt, and llms.txt?
Has a structured data (schema) been implemented and tested?
Do you have a redirect plan covering legacy URLs, canonical rules, and pagination?
Is there monitoring in place to track indexing changes post-launch?
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Website Migration Launch
Once you’ve completed all necessary web development tasks related to the migration, it’s time to launch the new version of your website. At this stage, your project manager and SEO specialist should focus on ensuring proper indexation and maintaining organic traffic flow.
Ensuring Access and Verifying the Robots.txt File
When the site is ready for indexation, your SEO specialist should unblock access to Google bots and verify their activity on the new site. Conducting an additional crawl at this point can help ensure everything is working as intended.
An important part of this process is verifying the robots.txt file. Check the robots tags (INDEX and FOLLOW) for all subpages you intend to index. If this file is missing or misconfigured, it could prevent Google bots from accessing the site, severely affecting SEO.
Verifying Removal of the NOINDEX Tag
Previously, you used the NOINDEX tag to prevent Google from indexing the test or “staging” version of your site. Now, as the site goes live, remove this tag from all pages intended for indexation. Conducting a full crawl will help you verify this, but you should manually inspect the source code of key subpages to be sure no remnants of the NOINDEX tag are left behind.
Checking 301 Redirects
Use a tool like Screaming Frog to generate a redirection report and verify that all 301 redirects are permanent and functioning as expected for the proper transfer of SEO authority. Avoid any 302 redirects as they are temporary and can negatively affect the SEO value of redirected pages.
Verifying the Sitemap and Submitting It to Google Search Console
The sitemap plays a role in helping Google index your site efficiently. Your sitemap has to be correctly structured and divided into sections (e.g., blogs, images, product pages) to improve the search engine’s ability to crawl your site.
For websites with numerous URLs, such as e-commerce sites, consider splitting the sitemap into smaller, more manageable parts. Once verified, submit the sitemap to Google Search Console to monitor its performance and resolve any issues.
Implementing Meta Titles and Descriptions
Meta titles and descriptions affect both indexation and search engine rankings. These should be implemented from the beginning, and following a consistent format to improve click-through rates (CTR). A well-crafted meta description encourages users to click on your site from the search results, boosting qualitative organic traffic.
Verifying Analytical Codes
After migration, analytical codes, such as those for Google Analytics and Google Search Console, may not be transferred automatically. It’s crucial to ensure that these codes are correctly placed and that your tools are capturing data accurately. Manually check the page headers to confirm Google Analytics is operational, and verify the site’s indexation with Google Search Console.
Conducting a Cognitive Walkthrough
If you have a User Experience (UX) specialist on your team, a Cognitive Walkthrough can be invaluable. It evaluates the usability of the newly migrated site by simulating a user’s journey and asking key questions about ease of use. The results of this analysis can highlight potential UX issues and help you refine the site.
Post-Launch: Verifying the Effects of a Successful CMS Migration
After completing the CMS migration, it’s important to review and verify the results using the data collected before and after the migration.
In the Lyngen North project, a structured post-launch validation checklist (redirects, schema, URL consistency, and analytics monitoring) ensured the new setup went live without SEO disruptions.
Lyngen North
Building a Fast Sanity Website for the Extraordinary Hotel
The verification process should be done twice: once immediately after the launch and again one to two months later to track long-term impacts.
Monitoring Organic Traffic
Monitor changes in organic traffic post-migration, as fluctuations might not be immediate. It’s essential to check traffic trends over time to identify any long-term impacts on visibility and user behavior.
Website Speed Performance
Page speed is crucial for user experience and SEO. Keep a close eye on loading times, as slower speeds can negatively affect user engagement and search rankings. Consistently monitor speed statistics post-migration to see if your website performs efficiently.
For real-time monitoring, you need RUM (Real User Monitoring). Tools like Vercel Analytics show live performance data per device, browser, and exact URL. This will help you react faster and catch regressions early.
Jakub Dakowicz, Pagepro CTO
Questions to Ask Your Team
Are you targeting the current Core Web Vitals: LCP, INP, CLS?
Is performance being tested with both lab tools (Lighthouse/PSI) and RUM (e.g., Vercel Analytics)?
Have performance budgets or thresholds been agreed upon?
Is the caching strategy aligned with how content updates (ISR, caching headers, CDN rules)?
Feedback and Analysis
Based on the feedback from analytics tools (like Google Analytics and Google Search Console), you can check whether the migration was successful. Any noticeable deviations in traffic, speed, or other performance metrics should be investigated further to identify potential issues.
Source: Google Help
Google Search Console Investigation
Google Search Console is a great tool for detecting any issues resulting from the migration. It can alert you to critical migration errors, which could affect your site’s indexing and performance.
Here are some common issues you should watch out for:
Indexed website but blocked by robots.txt – This error occurs when a subpage is indexed but blocked by the robots.txt file. Check for incorrect noindex tags.
404 errors on sent URLs – These errors indicate that certain pages are not found after migration. Implement proper redirects (301 redirects) for these pages.
5xx server errors – Often caused by hosting issues, these errors should be addressed immediately, since they prevent users and search engines from accessing your site.
Indexation errors – These require individual investigation for each affected URL to determine the cause of the indexing issue and how to resolve it.
Speed Verification
Speed is very important for user satisfaction and SEO performance. Compare the loading speed of your newly migrated website with the pre-migration version.
Indexing Status
Use Google Search Console to compare the number of indexed pages on your new site with those on your old site to verify no pages were lost during the migration process to a new CMS.
Subpage Traffic Comparison
Review traffic to individual subpages through search and compare these results with the pre-migration data to determine if there were any significant drops in traffic to important pages.
Performance Testing
Conduct performance tests on the new website, specifically looking at page speed, responsiveness, and overall functionality. Compare these results with the pre-migration website data to decide if the transfer to a new CMS was a success.
Migrate Your CMS Successfully
Migrating to a new CMS is a complex but rewarding process that can significantly improve your website’s functionality, user experience, and performance. A well-executed CMS migration can transform your business, and deliver a better experience and new content for your users.
If you need a more detailed migration guide, be sure to contact our experts. Guidance can make all the difference in ensuring a smooth and successful migration process.
A CMS (Content Management System) is software that allows you to create, manage, and publish digital content without coding. It stores content in a structured format and separates it from design for easy updates.
How much does a CMS cost?
CMS pricing typically ranges from a few hundred to several thousand dollars per month for enterprise setups. Some are free and open source, while others use subscription or usage-based pricing. Costs may include hosting, licenses, development, maintenance, security, and content operations.
What is an example of a CMS?
Sanity is an example of a modern CMS built for structured content, scalability, and API-based delivery. It works great for teams that need flexible content models and multi-channel publishing.
How does a CMS work?
A CMS works by separating content from the design and code. Editors create content in an interface, and the CMS stores it in a database or content repository. The website or application then fetches that content and displays it using templates or APIs, depending on the platform.
What is a CMS migration?
A CMS migration is the process of moving a website from one content management system to another. It includes transferring content, media files, URL structures, metadata, and workflows. The goal is to improve the site without losing SEO or breaking existing pages.
Can CMS migration affect SEO?
A CMS migration can improve SEO, but it also has the potential to harm it if not planned correctly. Redirect mapping, metadata, structured data, URLs, and internal links must be preserved. With proper planning and validation, a migration can protect existing rankings and even improve performance, Core Web Vitals, search visibility, and AEO readiness.
