A website migration occurs when a website moves from one environment to another, or there’s a change in regards to a site’s domain name. In SEO terms, whenever a fundamental change happens to the URL structure of a site, the move is considered a migration. Website migrations fall into several general type.

Whether it’s a company rebrand or a case where a stronger domain name is acquired, websites may choose to move to a new URL. If there is a change to at least one letter, number, character, or domain extension (eg. .com, .org, .net, etc.), this is a change which is applied to every page on a site.