SEO migration
An SEO migration accompanies any structural change — domain switch, site rebuild, site merger — to preserve earned rankings. Its cornerstone is the URL mapping table and its 301 redirects.
In practice
The method runs in three phases: full inventory before (URLs, positions, inbound links), page-by-page mapping, verification after launch — crawl, coverage report, traffic curves. A temporary drop over a few weeks is normal. Genuinely failed migrations are recognizable by mass 404s and 'everything redirecting to the homepage.'