Website Migration SEO Guide — Zero Traffic Loss
URL mapping, 301 strategy, schema parity, and Search Console monitoring for redesigns and replatforms.
1. Inventory & Mapping
Crawl the old site completely — every URL with traffic, links, and rankings. Map each to its new counterpart; near-matches beat homepage redirects, which read as soft-404s to Google.
Freeze content changes during migration week. Changing URLs and content simultaneously makes it impossible to diagnose traffic moves.
2. Redirects & Parity
Implement 1:1 301s server-side before launch, then crawl the redirect chains to eliminate hops. Keep old XML sitemaps live for 30 days so Google discovers the mappings.
Maintain parity on titles, H1s, schemas, and internal links. Redesigns that 'simplify' metadata routinely lose 20–40% of long-tail traffic.
3. Monitor & Recover
Watch Search Console coverage daily for two weeks: 404 spikes, redirect errors, and excluded-valid patterns. Fix within 48 hours — ranking recovery decays with time.
Expect a 2–4 week wobble even in perfect migrations. Pré-write the stakeholder update so nobody panics at week two.
Frequently asked questions
How long until rankings recover?
2–6 weeks for clean migrations. Past 8 weeks with losses means a mapping or parity bug — audit redirects and metadata.
Should we migrate during festive season?
Never for commerce. Migrate in your lowest-traffic 3-week window with a full rollback plan.