Why a relaunch costs rankings and the checklist that carries your visibility through the move: 301 redirects, content, technical basics.
A new site should look fresher and work better. What often comes along goes unnoticed at first: a drop on Google. After launch, traffic falls, enquiries dry up, and nobody knows why. It does not have to be this way. Rankings survive a relaunch when a few things are right.
Over years, Google has learned which of your addresses stand for what. A relaunch often changes exactly that: new addresses, a different structure, rewritten text. If Google cannot find the old pages again, the trust you built is gone, and the buildup starts partly from scratch.
When addresses change, every old address has to point permanently to its new target, via a 301 redirect. That way the trust you built carries over to the new page.
Visibility hangs on content. Do not throw away what ranks during a relaunch.
The move is not done at launch. In the first weeks you check in Search Console whether pages fall out of the index, redirects run into nothing, or errors show up. Caught early, most of it is fixed quickly.
Redirect old addresses cleanly, carry content and structure across, check the technical basics and watch it afterwards. Do that and you move without crashing.
Planning a rebuild and want to avoid the ranking drop? Have a look at Websites and the SEO and GEO analysis, or drop me a line via the contact page.