The migration SEO
phase guide.

Before anything changes, you need a complete picture of what exists. This means a full crawl of the current site that captures every URL, its HTTP status, its canonical tag, its index status, its internal link count, and its estimated organic visibility.

The output of this phase is the source of truth for everything that follows. The redirect map references it. The post-launch monitoring uses it as a baseline. Without it, you are working without reference points.

Understanding the URL structure of the destination platform is the second phase. This is where you identify the scope of change. Some migrations involve minimal URL changes. Others involve a complete restructuring of the URL pattern across every section of the site.

The scope of URL change determines the complexity of the redirect map and the level of risk in the migration. A migration with few URL changes requires less redirect work but still requires verification. A migration with wholesale URL restructuring requires careful, page-level mapping.

With the current state documented and the new URL structure understood, the redirect map can be built. Each URL in the inventory receives a destination. Pages with direct equivalents on the new platform get mapped to them. Pages that were consolidated, removed, or restructured get mapped to the most contextually appropriate remaining page.

Redirect chains are a particular concern here. If a URL was already redirecting to another URL before the migration, adding a new redirect creates a chain. Chains slow crawlers and dilute equity. Every chain in the map gets collapsed to a single hop.

When the new platform is built on staging, a structured review checks whether the SEO requirements from phases one through three have been implemented correctly. This is where implementation errors get caught before they go live.

The most common staging issues involve redirect implementation, canonical tags, and blocking directives. Staging environments often have noindex directives applied globally. These must be removed before launch. Canonical tags on staging pages sometimes point to staging domain URLs. These must reference the production domain.

After launch, the monitoring phase begins. Search engines are now crawling and reprocessing the site. Coverage reports start to reflect the new URL structure. Crawl error logs show which URLs are returning unexpected status codes.

The monitoring schedule runs for a defined period and covers a set of specific signals. Coverage report trends, crawl error volume, sitemap processing status, and ranking movement for priority pages. Issues discovered during monitoring go through a fast response process: identify, document, fix, verify.