This is a genuinely common, genuinely avoidable mistake: a business redesigns its website, and traffic that took months or years to build quietly disappears over the following weeks — and nobody notices until it's already happened.
URL changes are the biggest single cause
If a page that used to live at `/services/web-design` moves to `/what-we-do` during a redesign, and nothing tells Google the old URL now lives at the new one, every bit of ranking history attached to that old URL is effectively lost. Visitors and Google both hit a dead end.
The fix is 301 redirects — a simple server-level rule that says "anyone looking for this old URL, send them to this new one instead." Before any redesign, the single most important prep step is exporting a complete list of every current URL, so nothing slips through when the new structure goes live.
Losing content is the second mistake
A redesign that rewrites every page's copy from scratch can accidentally drop the specific phrasing that was actually ranking, swapping content that reads better for content that ranks worse. A good redesign process improves what isn't working and keeps what is, rather than starting every page from a blank page.
Losing the technical layer is the third
Schema markup, meta descriptions, a working sitemap — all of it can quietly disappear during a rebuild, resetting technical SEO progress back to zero without anyone actually deciding to do that.
A pre-launch checklist worth actually running through
Every old URL has a redirect to its new equivalent. Meta titles and descriptions were carried over or deliberately improved, not lost. The sitemap reflects the new structure. And Search Console is watching the property closely after launch, so indexing issues surface within days, not weeks.