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URL mapping is a foundational element of enterprise replatforming, creating a detailed plan for how old URLs transition to new ones while preserving SEO value and user experience. Effective URL mapping begins with a comprehensive site crawl to inventory all existing URLs, identify their performance, and understand their importance.
Mapping Strategy Teams should create a detailed spreadsheet mapping each old URL to its corresponding new URL, prioritizing pages with high traffic, backlinks, or conversion value. A 1:1 redirect approach maps each old URL directly to its semantic equivalent on the new platform. Regex redirects use pattern matching to handle bulk URL changes efficiently, such as when restructuring directory hierarchies. For pages with no direct equivalent, teams should redirect to the most relevant new page or create a custom 404 page explaining the change.
Implementation and Validation All redirects must be 301 permanent redirects, which signal to search engines that the move is permanent and pass link equity to the new location. Avoid redirect chains where Page A redirects to Page B, which redirects to Page C, as these waste crawl budget and dilute SEO value. After launch, validate that all redirects are functioning correctly using tools like Screaming Frog, and monitor search console for crawl errors. Maintaining redirect infrastructure long-term is essential, as users may click old links from emails, bookmarks, or external sites for months or years after migration.