Solved problems. Proven solutions.

Do not change established URLs only for cosmetic reasons. A shorter slug is rarely worth migration risk if the existing URL is stable, indexable, and performing well. 1. Change the slug when there is a durable reason: incorrect taxonomy, rebrand, merged content, major information-architecture change, or unusable legacy format. 2. Map the old URL directly to…

Treat redirects as a data-mapping problem and test them before DNS or routing changes go live. Export all meaningful legacy URLs from analytics, Search Console, XML sitemaps, crawls, backlink tools, server logs, and important campaign lists. Deduplicate them into one migration inventory. Assign each old URL one explicit destination based on content equivale…