Site migration
Any change to a site's domain, URL structure, platform, template or content organisation that materially affects how search engines see it.
BusinessCMS migration
Replatforming
Moving a site to a different content management or commerce platform, a migration type where URL patterns, rendering and metadata control all change at once.
In full
The specific SEO risks are platform-imposed URL structures, loss of granular control over canonicals, hreflang and robots directives, changes from server-rendered to client-rendered templates, and default settings that create index bloat. These constraints should be evaluated during platform selection, not discovered after signing. Vendor demos rarely surface them, so a technical requirements list belongs in the procurement process.
Example
A commerce platform forces `/collections/x/products/y` URLs and generates a second canonical path per product, requiring rules before launch.
Related terms
URL structure
The design of a site's URL paths: readable, stable, lowercase, hyphen-separated and free of unnecessary parameters or session identifiers.
JavaScript rendering
The execution of a page's client-side JavaScript by a search engine so that content and links generated at runtime become indexable.
SEO governance
The processes and ownership that keep SEO requirements enforced over time, review gates, standards, documentation and escalation paths.
SEO technical debt
Accumulated unresolved technical issues (legacy redirect chains, duplicate URL patterns, orphaned templates, stale markup) that compound…