The most preventable disaster in digital marketing
A business invests in a beautiful new website, launches it, and organic traffic falls by half within a fortnight. It happens constantly, and almost every instance is preventable with work that costs a few hours.
The cause is nearly always the same: nobody inventoried what existed before it was replaced.
Before design begins
1. Export a full URL inventory. Every page on the current site, from a crawl and from your sitemap.
2. Pull performance data for each URL: organic sessions, impressions, conversions, and backlinks. Twelve months of data, so seasonality does not mislead you.
3. Identify the pages that matter. Usually a small fraction of URLs produce most of the value. Those pages are constraints on the redesign, not suggestions.
4. Record current metadata for those pages: titles, descriptions, headings, and structured data.
5. Note internal linking patterns, especially which pages receive many internal links.
This inventory is the single most important artefact of the project. Without it, decisions about what to remove are made blind.
During design
- Preserve URLs wherever possible. Changing URL structure for aesthetic reasons is the most common self-inflicted wound.
- Keep the content of high-performing pages. A page that ranks does so because of its content. Cutting the text by seventy percent for a cleaner look removes the reason it ranked.
- Preserve heading structure and key terminology.
- Maintain internal linking, particularly to important pages.
- Plan for equivalent or better speed. Heavier pages after redesign are common and costly.
Redirect mapping
For every URL that changes or disappears, define a permanent redirect to the closest equivalent page.
Rules:
- One to one wherever a genuine equivalent exists.
- Never redirect large numbers of pages to the homepage. It signals irrelevance and loses the value entirely.
- Avoid chains — each redirect should point to the final destination directly.
- Redirect old image and document URLs too, where they attracted links or traffic.
- Test the full map on staging before launch.
Pre-launch checklist
- Staging site blocked from indexing, and that block removed before going live.
- Redirect map implemented and tested.
- Metadata migrated for priority pages.
- Structured data implemented and validated.
- Analytics and conversion tracking installed and verified on the new site.
- Sitemap regenerated to include the new URL set.
- Robots file reviewed for leftover staging restrictions.
- Forms tested end to end, including delivery to the CRM.
- Page speed measured on mobile and compared against the old site.
The single most common launch failure is a staging noindex directive shipping to production. Check it twice, on launch day, on the live domain.
Launch day and the first week
- Verify the live site is crawlable and pages return the expected status codes.
- Submit the updated sitemap.
- Crawl the live site and check for broken links and unexpected redirects.
- Watch server logs or search console for crawl errors.
- Confirm conversions are recording.
- Check the top twenty pages manually rather than trusting a summary.
The weeks after
Expect a modest, temporary dip as the index updates. What is not normal:
- A steep drop that does not begin recovering within a couple of weeks.
- Pages disappearing from the index entirely.
- Crawl errors accumulating.
- Conversion rate falling even where traffic held.
If any of these appear, the first place to look is the redirect map, then indexing directives, then page speed.
Content pruning done safely
Redesigns are a good moment to remove genuinely obsolete pages. Do it deliberately:
- Remove only pages with no traffic, no conversions, and no backlinks.
- Redirect anything with links to a relevant equivalent.
- Keep a record of what was removed and why, so a future traffic question can be answered.
The organisational fix
Most migration disasters happen because SEO was consulted after design was approved and development had started.
Involve whoever owns search performance at the inventory stage. The cost is a few hours early. The cost of not doing it is measured in quarters of recovery.
