Inventory what exists
Export every URL from your sitemap, analytics and Search Console. Note which pages get traffic, links or conversions — they need the most care.
Map old URLs to new ones
Every important old URL should 301-redirect to the closest matching new page. Avoid sending everything to the homepage; that is treated like a missing page.
Keep what made pages useful
If a page ranked because it answered a question well, the new page should answer it at least as well. Design changes should not remove useful content.
Make essential content crawlable
Make sure page text is in the HTML that loads, not only rendered by JavaScript after the fact, and that each page has a unique title, description and heading structure.
Check after launch
Test redirects, submit the new sitemap, watch crawl errors and compare traffic for key pages over several weeks. Fix issues quickly — most problems are visible within days.
Written by the ARQENSIAL team. General guidance only — your situation may differ.
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