Q: Moving my blog — subdomain (blog.site.com) or subfolder (site.com/blog)? Which migrates better?

Q: Moving my blog — subdomain (blog.site.com) or subfolder (site.com/blog)? Which migrates better?

This worries a lot of people because the migration itself is identical work — the difference is what happens after.

Short answer: subfolder usually consolidates authority better and is the lower-risk migration target.

Long answer:
Google treats subdomains as somewhat separate properties. A subfolder more clearly inherits the main domain's authority, which is why many sites moving for SEO go subdomain to subfolder.

The migration mechanics are the same — 301 each old URL to its new home, update internal links, resubmit sitemaps. The catch with subdomains: you maintain separate GSC properties and sometimes separate analytics, which makes tracking the migration messier.

Don't move just because 'subfolders are better' — if your blog is on a different CMS or team, the operational cost can outweigh the SEO gain.

Next step: if consolidating authority is the goal, plan a subdomain-to-subfolder move with full per-URL 301 mapping.