---
title: "Site Migration"
description: "Site migration is the process of making significant changes to a website's structure, domain, platform, or design that can substantially affect search engine visibility if not handled correctly."
category: "Technical SEO"
date: "2026-03-05"
url: "https://getbeast.io/glossary/site-migration/"
type: "glossary"
---

# Site Migration

**Category:** Technical SEO | **Updated:** 2026-03-05

Site migration is the process of making significant changes to a website's structure, domain, platform, or design that can substantially affect search engine visibility if not handled correctly.

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## What Is a Site Migration?
A site migration encompasses any major change to a website that affects how search engines crawl and index it. This includes domain changes (old.com → new.com), HTTPS migrations (HTTP → HTTPS), CMS platform changes, URL structure changes, site redesigns that alter internal linking, and subdomain consolidations.

## Why Site Migrations Are Risky for SEO
Site migrations are among the **highest-risk SEO events**. Poorly executed migrations can result in massive traffic drops due to broken redirects, lost link equity, deindexed pages, and crawl errors. Even well-planned migrations typically see a temporary 10-20% traffic dip during the transition period.

## How to Execute a Safe Migration
Create comprehensive redirect maps (old URL → new URL). Implement 301 redirects for all changed URLs. Update XML sitemaps and internal links. Monitor crawl errors in Search Console. Analyze server logs with [LogBeast](/logbeast/) to verify Googlebot is following redirects correctly and crawling the new URLs.

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## Related Terms

- [301 Redirect](/glossary/301-redirect/)
- [Redirect Chain](/glossary/redirect-chain/)
- [Broken Link](/glossary/broken-link/)
- [Crawl Budget](/glossary/crawl-budget/)
- [Indexation](/glossary/indexation/)

## Further Reading

- [Site Migration SEO Guide](/blog/site-migration/)

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*Part of the [GetBeast SEO Glossary](/glossary/). Visit [GetBeast.io](https://getbeast.io) for professional SEO and log analysis tools.*