Redirect Mapping

Definition

Redirect mapping is the pre-migration planning work of documenting every URL on an existing site and specifying its correct new destination URL. The redirect map is typically a spreadsheet with columns: old URL, new URL, redirect type (301, 302, or no redirect needed if the URL carries over unchanged), and priority (high-traffic pages, pages with strong backlink profiles, and pages in the current Google index). The redirect map is created before migration execution using: a full site crawl to enumerate all live URLs, Google Search Console\'s Coverage report to identify indexed URLs (which may include URLs not found in the crawl), and the backlink report from GSC or a third-party tool (to identify which URLs have significant link equity that must be preserved). During migration, the redirect map is implemented in the server config (.htaccess, nginx, CDN redirect rules, or a redirect manager plugin), then verified post-migration by crawling the old URL list and confirming each returns the expected status code.

Why it matters for SEO

Failure to create and implement a complete redirect map before site migration is the most common cause of post-migration traffic loss. Every old URL that 404s instead of 301-ing to its new destination loses its accumulated link equity — that link equity was earned over months or years and cannot be recovered once the redirect is missed. The traffic impact is immediate: Google demotes pages that suddenly return 404, and users who click old bookmarked links, cached results, or external links hit a broken page. A comprehensive redirect map eliminates these failures by ensuring every old URL has an explicit destination before the migration goes live.

How DeepSEOAnalysis checks this

DeepSEOAnalysis detects broken links (URLs returning 404 or 5xx) and redirect chains (3xx → 3xx sequences) during site crawl. Post-migration, auditing the new site reveals any old URLs that weren\'t correctly redirected (appearing as 404s when crawled or accessed via old links). Pre-migration redirect map creation and validation requires a crawl of the old site combined with GSC indexed URL data — typically performed in a spreadsheet tool rather than by the audit tool.