A Checklist For Website Migration For B2B Companies

Moving your website to a new platform is one of those projects that sounds straightforward until you're in the middle of it. Here's what you actually need to track to avoid losing traffic, leads, and sleep.

What Actually Happens When You Migrate A Website

A website migration isn't just moving files from one server to another. You're relocating your entire digital presence — every page, every URL, every piece of content that's been indexed by Google over months or years. And you're doing it while trying not to break the things that are already working.

In our experience, most B2B companies underestimate how much can go wrong. You're changing platforms, updating URLs, restructuring content, and hoping your search rankings don't tank in the process. The technical side is complex enough. Add in content mapping, SEO preservation, and stakeholder expectations, and you've got a project that needs proper planning.

Here's the thing: migrations fail when you don't document what you have before you move it. You need to know every page that exists, every redirect that's already in place, every form that captures leads. If you don't map it before migration, you won't know what broke until someone tells you — usually a customer who can't find what they're looking for.

Pre-Migration Audit: Know What You're Moving Before You Move It

Start with a full content inventory. Crawl your existing site and document every URL, every page title, every meta description. Use tools like Screaming Frog or Sitebulb to capture everything that's live. Don't rely on your sitemap — it's probably incomplete.

You need baseline analytics before you migrate. Pull traffic data for the last 12 months. Identify your top-performing pages, your main traffic sources, your conversion paths. Note which pages drive leads and which pages rank for your target keywords. If you don't capture this before migration, you won't have a proper comparison point after launch.

Document your existing redirects. Most sites already have redirect chains from previous updates. If you migrate without accounting for these, you'll create redirect loops or broken paths. Export your current redirect map from your server or CDN so you can rebuild it properly on the new platform.

Audit your technical setup. What's your current site speed? How does your mobile performance measure up? What's your Core Web Vitals baseline? Check your structured data markup, your XML sitemaps, your robots.txt configuration. These details matter because they'll all need to be replicated or improved in the new environment.

Finally, identify every form, every CTA, every lead capture point on your site. Test them before migration to confirm they're working. Document where each form sends data — CRM, email platform, spreadsheet. You'd be surprised how many migrations break lead capture because no one mapped the integrations beforehand.

Technical SEO Preservation: The Things That Break If You're Not Watching

Your URL structure is the first thing that can hurt you. If your new platform changes how URLs are formatted, you need a redirect plan. Every old URL should map to a new URL — ideally a 301 permanent redirect. No redirect means a 404 error, and 404s mean lost rankings, lost traffic, and lost leads.

Create a comprehensive redirect map before launch. Match every old URL to its new equivalent. If a page is being removed entirely, redirect it to the most relevant alternative. Don't redirect everything to the homepage — that's lazy and Google knows it. Use a spreadsheet to document old URL, new URL, and redirect type for every page.

Preserve your metadata during migration. Page titles, meta descriptions, header tags — these all carry SEO value. If your new CMS resets them to default values, you'll lose the optimization work you've already done. Export all metadata from the old site and import it into the new one before launch.

Your internal linking structure matters more than most people realize. If you change URLs without updating internal links, you'll break navigation paths and dilute link equity. Run a post-migration crawl to identify broken internal links, then fix them systematically.

Don't forget structured data. If your old site used schema markup for products, articles, or business information, replicate it on the new platform. Structured data helps search engines understand your content, and losing it can affect how your pages appear in search results.

Check your XML sitemap after migration. Generate a new one that reflects your updated URL structure, and submit it to Google Search Console. Monitor the index coverage report to catch any pages that aren't being crawled or indexed properly. Worth knowing: indexing issues often don't surface immediately, so keep checking for at least a month after launch.

Content And URL Mapping: Where Everything Needs To End Up

Content mapping is where strategy meets execution. You're not just moving content — you're deciding what stays, what goes, and what gets consolidated. Start by categorizing every page: keep as-is, update and keep, merge with another page, or retire entirely.

For pages you're keeping, create a mapping document that shows old URL and new URL side by side. Include page titles, primary keywords, and any notes about content changes. This document becomes your redirect map and your content migration checklist.

If you're consolidating content, be deliberate about it. Merging multiple thin pages into one comprehensive resource can improve SEO, but you need to preserve the best elements from each source page. And you need to redirect all the old URLs to the new consolidated page so you don't lose the authority those pages built over time.

Handle retired content carefully. If a page isn't relevant anymore, don't just delete it and leave a 404. Redirect it to the closest relevant alternative. If there's no good alternative, consider keeping the page live with a note that the content is outdated and linking to current resources.

Your navigation structure will probably change during migration. That's fine, but map it intentionally. Document your new navigation hierarchy and make sure high-value pages are easily accessible. Pages that are buried five clicks deep get less traffic and less link equity than pages in your main navigation.

Test every URL mapping before launch. Use a staging environment to validate that redirects work, that content displays correctly, that forms and CTAs function as expected. Catching issues in staging is cheaper and less embarrassing than fixing them after launch when customers are already encountering problems.

Post-Migration Testing And Monitoring: Making Sure Nothing Fell Through The Cracks

Launch day isn't the finish line — it's the start of your monitoring period. The first 48 hours after migration are critical. Monitor server logs for 404 errors, check Google Search Console for crawl errors, and watch your analytics for unusual traffic drops.

Run a full site crawl immediately after launch. Compare it against your pre-migration crawl to identify any pages that didn't migrate correctly, any redirects that aren't working, any broken links that need fixing. This is tedious work, but it's necessary.

Check your forms and conversion points manually. Submit test leads through every form to confirm they're still sending data to the right place. Most migrations that lose leads do so because form integrations break and no one notices until the sales team asks why inquiries dropped off.

Monitor your search rankings weekly for the first month. Some fluctuation is normal during a migration, but significant drops indicate a problem. If a page that ranked well before migration disappears from results, investigate immediately. Check the redirect, the content, the metadata, the internal links pointing to it.

Track your Core Web Vitals and site speed metrics. Migrations can impact performance if the new platform isn't optimized properly. If your new site is slower than your old one, you'll see it reflected in rankings and user experience metrics. Use Google PageSpeed Insights and Search Console to identify performance issues early.

Set up custom alerts in Google Analytics and Search Console so you're notified of significant traffic drops or error spikes. You want to catch problems early, not discover them when reviewing monthly reports weeks after launch.

Plan for a post-migration optimization phase. Even with thorough planning, you'll find things that need adjustment. Budget time and resources for fixing issues, refining redirects, and improving elements that didn't migrate as cleanly as you hoped. Most migrations need at least a month of active monitoring and refinement before you can consider them truly complete.