Why MoZ Bar gives different PA and DA to my homepage? Surly they should have the same metrics?

[RCunningham]

Yiannis

You may have already read this but this is a great article about the DA and PA may throw some light for you Sir. http://moz.com/blog/whiteboard-friday-domain-authority-page-authority-metrics

All the best
Ryan

[artdivision]

Hi Ryan,

Yes, im talking about the MoZ Pro bar (PA, mR, DA). "Page authority" and "Domain Authority" are both MoZ metrics, and whilst on the root of my site (i.e. my homepage) they should both provide the same metric.

Thanks,
YG

[RCunningham]

You got me I have no idea why you would be getting different metric's I agree they should pull from the same scrape ? Although now you have me on a mission to find out why

Best
Ryan

[artdivision]

i will be waiting in anticipation for one of the MoZ's to share some light on this.

Cheers.

[RCunningham]

As I shall be as well mate. Thanks for the chat, if you can hit this with an update when you get an answer be greatly appreciated.

Cheers
Ryan

[Linda-Vassily]

All pages on your domain have the same domain authority. Each page has its own page authority.

The page authority of the home page can be the same as the domain authority, but it does not have to be.

For example, the page authority of moz.com (homepage) is 92 (looking at the moz bar) and the domain authority is 93. For www.macys.com (homepage) the page authority is 90 and the domain authority is 87.

[artdivision]

Hi Linda,

Thanks for the reply. What you are mentioning above is correct. i mean, this is what we are experiencing but feel it is not right, therefore wanted to understand why is that happening? and why the two metrics do not match? How can it be that the same page (i.e. homepage and root domain) give different metrics they have the exact same data.

and assuming there will be an argument that explain that strange behaviour, which of the two metrics should we take in consideration?

YG.

[Linda-Vassily]

The root domain does not have the same data as the homepage.

The domain authority takes the entire website into account and the homepage page authority takes only one single page, the homepage, into account.

Look at Moz again as an example. The homepage has 342,922 links from 11,650 root domains. The root domain has 15,899,372 links from 46,201 root domains. So they are not the same.

I do not know the mysterious details of how the authorities are calculated, but they are taking different data into account and one is looking at a single page while the other an entire site so it is not at all surprising that they can be different.

[artdivision]

Hi Linda,

Now this starts to make sense. Based on your assumption that the DA is calculated based on the entire site (i.e. all pages) and the PA is based on a single page it will make sense. i guess it is the difference of evaluating your "House" as a whole or just the "Front Door" when you stand in-front of it.

I think that has satisfy (for now...) my curiosity.

YG.

[Linda-Vassily]

Yes, that is exactly it. And yes, your curiosity should never be completely satisfied...