Are you using sub-folders or sub-domains? Don’t Get This Technical Issue Wrong!

SEO Success


“It is very dangerous to put content on a sub-domain.” Says Rand Fishkin, a highly recognized top tier SEO expert.

Search engines have made strides to associate content on sub-domains with the domain but, “they aren’t good or perfect enough to rely on.” Rand’s advice is, “I’d really urge everyone to keep your content on one single root domain preferably in sub-folders – that’s how you are going to maximize your potential SEO benefits.

  • Use sub-folders to your main domain for all your content to build your domain authority
  • That includes all your content wherever it is hosted or syndicated (for example any and all of your product detail pages, SaaS catalog pages, CAD model download applications, etc.)
  • If external apps or SaaS solutions can’t operate as sub-folders of your domain look for alternatives that can – call us for advice if necessary (BTW CDS Catalog as a Service and CAD as a Service can do this under patent pending technology
  • Only after you’ve maximized your natural SEO ranking, consider paying search engines for SEM ranking
  • The key is to get lots of pages indexed under your main domain. Use the Site: command in the Google search box to find out how many pages you have indexed (minus PDFs). Ex: -.pdf
  • When using the Google search operator “site:”, you can search for “olympics” on all “.gov sites with the string “olympics”, similarly you can search your domain and any sub-domains it may have with the string “” but to only search your domain use the string, “”. Beware folks telling you that searching for “” is the same as “” because it isn’t! The former searches anything ending with “” (including and sub-domains such as, whereas the latter only searches