PA and DA

[casper434]

Over the past couple of monthly updates I have notice both coming down a bit even though nothing has changed that should affect them. Anyone else notice this? Perhaps it is attributable to better metrics?

[JasonJackson]

The metrics are in a constant state of update I'd guess.

[NakulGoyal]

Think of these metrics as relational. As Google tweaks it' algorithm, based on what's going on in the world of search, OSE/SEOmoz might update the criteria of discounting certain kinds of links, and the flow of internal and external link juice. Their dataset also is expanding and as they read and discover more data, the overall metrics change, impacting the scores. I would relate them to your competition and see how you are doing to get a big picture rather then worrying too much about the movement within your website. It's very very useful data regardless.

I hope this helps.

[KeriMorgret]

Here's a help page about our DA calculations that may help http://www.seomoz.org/learn-seo/domain-authority. The short answer is that DA can change because of the way we calculate DA and because our index changes each update.

[casper434]

thanks very much Keri