The horror story is common: a business launches a beautiful new website and its Google traffic falls off a cliff. The cause is almost never the redesign itself — it's the migration being treated as an afterthought. Here's the playbook we use, including on our own site.
Rule one: every old URL must have a destiny.
Google ranks URLs, not websites. When a page that ranked disappears, its rankings don't transfer anywhere by magic — they evaporate. Before launch, crawl your existing site (the XML sitemap plus a crawler to catch strays) and give every indexed URL exactly one of two futures: it keeps its address on the new site, or it 301-redirects to its closest equivalent. Redirecting everything to the homepage doesn't count — Google treats mass homepage redirects roughly like deletions.
Keep the URLs that work.
If existing pages target keywords sensibly (say, /website-design-company-in-qatar/), keep those exact addresses even if every pixel on the page changes. A rebuilt page at the same URL inherits its history; a better page at a new URL starts from less. Change URLs only when the old structure is genuinely broken — and then redirect precisely, page to page.
The new site must be technically better, not just prettier.
- Speed — Core Web Vitals are a ranking input. If the redesign is slower than the old site, you've paid to rank worse.
- Crawlability — clean HTML, one <h1> per page, working internal links, an accurate new XML sitemap.
- Metadata parity — carry over (or improve) titles and descriptions; don't let a developer's placeholder text ship.
- Structured data — rebuild schema markup (Organization, FAQ, breadcrumbs); it rarely survives migrations by accident.
Launch-day checklist.
- 301 redirect map live and spot-tested on the top pages from Search Console's performance report.
- New sitemap.xml submitted in Google Search Console; old sitemap removed.
- Analytics and conversion tracking verified with a real test enquiry.
- Crawl the live site for broken links and accidental noindex tags (the classic: staging settings shipped to production).
- Watch Search Console coverage and performance weekly for the first month — small drops during reindexing are normal; a sustained slide means a missed redirect.
Done right, a migration doesn't just protect rankings — the technical upgrade usually improves them within a quarter. This playbook is exactly how we're migrating odysense.com itself; if your redesign is approaching, we're happy to review your migration plan before you flip the switch.