Export the current URL inventory and identify pages with traffic, links or commercial importance. Mapping these early is safer than discovering missing routes after launch.
Preserve intent even when structures change. Redirect each valuable old URL to its closest relevant new destination, carry over useful metadata and ensure canonical rules are consistent.
After cutover, monitor crawl errors, index coverage, analytics and real customer journeys. Migration QA continues after DNS changes; it does not end when the homepage loads.
Choose one high-value journey, document the current evidence and give the next change an owner, a success signal and a review date.