Blog on Subdomain or Subdirectory?

[Dino64]

I was wondering what the SEO impact was of having a blog on a sub domain or sub directory.

Which of the following is better?

1. blog.companysite.com

2. companysite.com/blog

Personally, I like making the blog a more important part of the site so 2) is preferable; however, I don't know which one is best for SEO purposes. Do the search engines consider a subdomain as a different website? Can SEO authority be passed through each equally?

What is your preference?

Regards, Dino

[SteveWebb]

Hi Dino,

The consensus in the SEO community is that search engines still identify subdomains as separate sites (with respect to how domain authority is calculated and distributed throughout the Web graph).

Therefore, the second option (i.e., companysite.com/blog) is much better from an SEO perspective because it consolidates all of the website's content under a single site and maximizes the flow of authority through that site.

[Dino64]

That is what I thought as well. Thank you for taking the time to answer.

Regards, Dino

[SteveWebb]

You're very welcome.  I'm glad I could help