What are the SEO related negative aspects of having a blog on a subdomain?

[PerchDigital]

Just double checking this one. Is it less than ideal to have a blog on a subdomain rather than as a sub folder on a domain?

[PerchDigital]

Hi Adam and Alan.

Thanks for the info. I figured as much but for some reason the fact it was a blog threw me as I rarely see blogs on a subdomain. Many thanks guys.

[AlanBleiweiss]

The specific concept is that when you have a blog in a sub-folder, any links you get to that also inherently bring value to the root domain. As you add content to the blog, you add content to the root domain, etc.

When you get links to a sub-domain, it's treated as a separate site, not in the way it does with a completely different domain name, but definitely less value in those factors than a sub-folder.  There are times when a sub-domain make sense, but usually only if the content runs along one niche across the larger site's spectrum or you're targeting a different audience.  If it's a completely different audience, splitting it out can be of value.

[AdamThompson]

Subfolder is more ideal. Seems link juice may get passed better between subfolder and domain than subdomain and domain.