Subdomain or subdirectory: what impact on your Google visibility?
Around "how to rank first on Google", this is one of the questions that comes up most often. Here is a clear, actionable answer, without unnecessary jargon.
TL;DR
Should the blog live at blog.yoursite.com or yoursite.com/blog? The question has fuelled SEO debates for years. Google says it handles both correctly; field experience, though, tends to favour the subdirectory — because it concentrates authority instead of splitting it. PageOneBoost applies this method for its clients — one-time yearly payment from €300, no monthly subscription, free audit.
What you need to understand
Understand the difference in treatment : A subdirectory is an integral part of the site: everything it earns — links, content, signals — benefits the whole domain. A subdomain can be assessed as a more separate entity, whose authority pools less naturally.
The subdirectory as the default choice : For a blog, guides or service pages, the subdirectory is the simple, safe choice: one authority to build, fluid internal linking, unified tracking. Absent a technical constraint, it's the standard recommendation.
The legitimate cases for a subdomain : An application distinct from the main site, a customer portal, a language run on a different system, a genuinely separate activity: when the technical or functional separation is real, the subdomain reflects it honestly.
The method, point by point
Don't migrate without a reason : If your existing subdomain ranks well, migrating to a subdirectory isn't urgent: every migration carries risk and a period of turbulence. Save it for a redesign you're already planning, with rigorous redirects.
Quality beats location : No architecture choice compensates for weak content, and excellent content eventually ranks in either setup. The subdomain/subdirectory call optimises at the margin — the value of the pages does the heavy lifting.
- Understand the difference in treatment
- The subdirectory as the default choice
- The legitimate cases for a subdomain
- Don't migrate without a reason
- Quality beats location
What PageOneBoost does for you
Everything above takes time, method and experience. That's exactly what PageOneBoost does: a free audit to measure your potential, then the complete foundation built — technical, content, Google Business Profile, reviews, authority — to target the first page for the long run.
Our model is simple: a one-time yearly payment, from €300, with no monthly subscription. The service covers 12 months and renews by tacit renewal. 100% white-hat method, measurable results. To talk it through: +33 1 84 80 13 42.
Frequently asked questions
Does Google treat a subdomain as a separate site?
Google says it can handle both configurations, but a subdomain may be treated as a more independent entity. When in doubt, the subdirectory guarantees all your efforts feed the same authority.
My blog is on a subdomain and doing well: should I migrate?
No rush: a successful migration requires page-by-page redirects and accepts a period of instability. Plan it as part of a redesign if at all — never as an isolated move "for SEO".
What about a completely separate domain for the blog?
It's the worst of the three options for visibility: you start from zero authority without benefiting from your main domain. Unless you're deliberately building a distinct brand, keep your content under your own domain.
Can anyone guarantee the top spot on Google?
No — nobody controls Google's algorithm, and a "guaranteed position" is a warning sign, not a selling point. What can be guaranteed: a proven, 100% white-hat method and measurable progress.
Where should you actually start?
With a proper assessment: indexing, current rankings, Google Business Profile, technical health. That's exactly what PageOneBoost's free audit covers — you know where you stand before investing anything.
Get onto the first page of Google
Free audit, one-time yearly payment from €300, no monthly subscription. PageOneBoost builds your visibility to last.
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