Technical SEO Guide: Fix What's Holding Your Rankings Back
Crawling, indexing, Core Web Vitals and site structure explained, with a practical checklist.
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Key takeaways
- Most traffic losses after a redesign come from missing redirects and removed content.
- Benchmark and crawl your current site before anything changes.
- Map every important old URL to its new home with 301 redirects.
- Check everything again on launch day and for the following weeks.
Why redesigns lose traffic
A new website should bring more enquiries, not fewer. Good website redesign SEO makes sure it does. But it's common to see rankings drop after launch, usually for avoidable reasons:
- URLs change without redirects, so Google and visitors hit 404 pages.
- Content is cut to make pages look cleaner, removing the text that ranked.
- Page titles, headings and internal links are lost in the new templates.
- Technical settings from the staging site, such as noindex, go live by mistake.
- The new site is slower because of heavy images, sliders and scripts.
Before you start: benchmark everything
You can't protect what you haven't measured. Before design work begins, record:
- Traffic and conversions by page from Google Analytics 4.
- Top pages, queries and clicks from Google Search Console (export at least 12 months).
- Pages with backlinks from your SEO tool, so they keep their value.
- Current rankings for your most important searches.
- Core Web Vitals and page speed for key templates.
Crawl the current site: use a crawler such as Screaming Frog to export every URL, title, meta description, heading and canonical. Keep the file; it becomes your redirect map and your quality check after launch.
Map content and URLs
Decide what happens to every important page. Each old URL should either keep its address, move to a new address, or merge into a better page.
| Old page | Decision | Action |
|---|---|---|
| Ranks and brings enquiries | Keep | Same URL if possible, same or better content. |
| Useful but URL changes | Move | 301 redirect from old to new URL. |
| Thin or duplicate | Merge | Combine into the strongest page, then redirect. |
| Outdated with no traffic or links | Remove | Let it return 404 or 410, or redirect to the closest relevant page. |
Keep your best-performing copy. You can improve layout and design without deleting the paragraphs that answer what your customers search for.
Plan your 301 redirects
- List every old URL that has traffic, rankings or backlinks.
- Match each one to the most relevant new page, not just the homepage.
- Use 301 (permanent) redirects, one step from old to new, with no chains.
- Update internal links to point straight to new URLs.
- Test every redirect on staging before launch.
Don't redirect everything to the homepage. Google treats mass homepage redirects like missing pages, so the old page's value is lost.
Carry over on-page SEO
- Page titles and meta descriptions for every important page.
- One clear H1 per page, with logical H2 and H3 headings.
- Image alt text and descriptive file names.
- Structured data: Organization or LocalBusiness, breadcrumbs, articles, products, FAQs.
- Canonical tags pointing to the correct final URLs.
- Internal links between services, locations and guides.
Want a second pair of eyes?We'll review your redirect map and staging site before you launch.
Get in touch Launch-day checklist
- Remove noindex tags and "discourage search engines" settings.
- Check robots.txt allows crawling.
- Switch on redirects and test a sample of old URLs.
- Submit the new XML sitemap in Search Console.
- Check Google Analytics 4, tag manager and conversion tracking.
- Test forms, phone links and checkout on mobile and desktop.
- Check HTTPS on every page, with no mixed-content warnings.
After launch: the first eight weeks
Some movement in rankings is normal for a few weeks while Google recrawls the site. Watch closely and fix problems quickly:
- Search Console: check the Pages report and 404 errors every few days at first.
- Crawl the live site and compare it with your pre-launch crawl.
- Compare traffic and enquiries page by page with your benchmark.
- Check Core Web Vitals once real-user data comes in.
- Update key external links, such as your Google Business Profile and directory listings.
Common redesign mistakes
- Launching with the staging site's noindex still switched on.
- No redirect map, or redirects added weeks after launch.
- Removing service pages or copy that brought enquiries.
- Changing every URL when there's no need to.
- Forgetting conversion tracking, so nobody can tell if the new site works.
- Launching on a Friday afternoon with nobody to fix problems.
Website redesign FAQs
Will I lose rankings when I redesign my website?
Not if the redesign is planned properly. A small, short-term fluctuation is common while Google recrawls the site. With redirects, preserved content and technical checks, many sites end up ranking better than before.
Should I keep the same URLs?
Keep them wherever they're already clear and descriptive. Only change URLs when there's a real benefit, and always redirect the old ones.
How long should I keep redirects in place?
Ideally permanently. Old URLs may still be linked from other websites, emails and bookmarks for years.
Is moving to a new platform riskier?
Platform migrations, such as moving to WordPress or Shopify, usually change URL structures, so redirect planning and technical checks matter even more. The same checklist applies, with extra testing.
The bottom line
A redesign is a chance to grow, not a risk to fear, and website redesign SEO is what makes it safe. Benchmark first, map every important URL, carry over your best content and on-page SEO, and watch closely after launch. Do that, and your new website keeps the rankings you've earned and builds on them.