The new website is ready, it looks great, and you launch it on Monday. By Wednesday, traffic has halved, and by the end of the month the enquiries have disappeared. This is not a made-up scenario - it is the most common way a good redesign turns into an expensive mistake. Here is how to avoid it.
Why traffic drops after launch
Google has spent years collecting information about your site: which URL contains what, which pages are important, which sites link to you. When you launch a new version, every changed URL is a new page to the search engine, and the old one has simply disappeared. Unless you have said explicitly “this has moved there”, the rankings you have built up stay at an address that no longer exists.
The result: hundreds of pages returning a 404 error, lost backlinks and months of recovery. The good news is that almost all of it can be prevented with planning.
Before the migration: preparation
1. Make a full inventory of your current URLs
Export every URL from the sitemap and from Search Console. This list is the foundation of the whole job - without it, nothing can be checked after launch.
2. See what actually brings value
From Analytics and Search Console, pull out the pages with the most traffic and conversions, as well as those with backlinks. They must survive at all costs - either at the same URL or with a correct redirect.
3. Record your baseline numbers
Organic traffic, rankings for your main keywords, number of indexed pages, speed. Without these numbers, you have no way of telling whether a drop after launch is the normal temporary fluctuation or a real problem.
4. Build a redirect map
A table with the old and the new URL for every page. The rule: every old page points to its closest equivalent, not en masse to the homepage - Google treats such redirects as soft 404s and passes no value.
During the launch
301, not 302
A permanent redirect transfers the rankings. A temporary one (302) tells Google to keep the old URL - exactly the opposite of what you want.
Remove noindex
The classic: the site is developed hidden from search engines, and someone forgets to remove the block. Check both robots.txt and the meta tags.
A new sitemap right away
Submit it in Search Console on launch day to speed up the crawling of the new structure.
Tracking up and running
Analytics and conversion goals should work from the very first minute - otherwise you are flying blind exactly when you need data the most.
After launch: the first two weeks
Day 1: go through the whole list of old URLs and check that each one leads where it should - with a 301 code and no chain of multiple hops. Check that the site can be indexed.
The first week: watch the coverage report in Search Console. A rise in 404 errors means missed redirects. Keep an eye on speed too - a new design often comes with heavier images.
The first month: compare your rankings with the baseline numbers. A temporary fluctuation lasting a few weeks is normal. If the drop keeps getting deeper after 4-6 weeks, something has been missed - the 12 reasons a site does not rank make a good checklist.
The special case: changing your domain
When the domain itself changes, the steps are the same, plus two mandatory ones: the Change of Address tool in Search Console (it tells Google explicitly that you have moved) and a site-wide redirect that preserves the path of every URL. Keep the old domain for at least a year - preferably longer, until the backlinks have been updated.
A migration is not a moment but a process: two weeks of preparation, one day of execution, a month of monitoring. Skipped preparation is paid for in traffic.
The five most expensive mistakes
Launching without a redirect map. Mass redirects to the homepage. A forgotten noindex left over from the staging environment. Launching on a Friday afternoon - if something breaks, nobody is around. And “we will measure later” - without baseline numbers, you can prove neither success nor a problem.
Conclusion
A URL inventory, a redirect map, 301s everywhere, a sitemap on launch day and a month of monitoring. Do these five things, and the migration will be invisible to visitors and painless for your rankings.
Planning a new website or a platform change? First check whether it is even the right time - the 8 signs - and then write to us. We have done these migrations enough times to know where the surprises hide.
