D.A. and Link Juice from certain websites

[prozis]

Hello,

i'm a bit confused concerning some link buildings.

What happens with backlinks from blogs coming from powerful domains such as abc.yahoo.com or abc**.over-blog.com or abc.blogspot.com?** Meaning, everyone that creates a blog over there will have a PA of 0/100 but a DA of 80 or 90/100.
Will Google consider DA on these cases?

I'm confused because it can't be that simple that someone creates a website, and after some months they will have like 10 PA but still the 90/100 DA and their links can be a powerful backlink.

Can you explain me how Google sees that?

So, if I have a link coming from a blog on those domains will it be better than any other with same PA but lower DA?

[MattRoney]

Hi there!

Apologies for the long wait for a response! It's sort of a convoluted answer.

For practical purposes, the search engines treat subdomains as their own separate domains. So, even though Blogger.com has a DA of 92, if you were to start a blog there you'd still be "starting over" when it comes to building link authority. A new blog there will notbenefit from blogger.com's existing authority.

Where Open Site Explorer and the Mozscape index are concerned, though, you'll still see a DA of 92 on that new, not-yet-established blog. In the simplest terms, that's because OSE calculates _domain _authority, not subdomain authority.

So, in this case, Page Authority would be the better metric by which to evaluate your new blog, as it will be specific to the home page at yourblog.blogger.com.

Does that make sense?