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In practice
The migration is the moment the link asset is most at risk, and the risk is entirely manageable with sequence. Before launch: the placement inventory exported (every live link, its publisher, its exact target URL), every target URL’s new address decided, the redirect map written — 301s, one hop, permanent — and staged. At launch: the map goes live with the site, and the verification runs immediately — each inbound link’s target checked through the redirect (a link that lands on a 404 is authority leaking in real time).
After launch: the monitoring continues on its normal cadence, now with redirect-chain checks added (hops that appear during migrations are the quiet equity leak), and the trackers of referring domains watched for the shakeout that follows every migration (some losses are natural; the map distinguishes them from fixable ones). The vendor’s role: if the placements were agency-managed, the migration briefing is a contractual item — the tracker handed to whoever needs it, the redirect map reviewed against it, the post-migration sweep run.
The special cases that need planning: domain changes (every placement eventually re-verified against the new domain — publishers’ links can’t be edited, so the redirects carry everything), platform changes that alter URL structures (the CMS’s URL habits decided before the move, not discovered after), and the international sites (per-market maps, because hreflang and redirects interact). The economics are stark: the link programme’s budget built an asset worth protecting for the cost of an engineer’s sprint — the migrations that skip this are burning the asset to save the sprint.
See also: Redirect safety in placements, Backlink monitoring and link tracking, Technical SEO prerequisites for link campaigns.
Related service: Link building strategy.
