Domain Authority

[KrisIrr]

I made some changes to my site and many of my keywords improved dramatically. Its odd however, that the changes caused the domain authority to go down by 3 points, from 20 to 17. Is this a short term thing caused by recent changes and likely to recover?

[EricaMcGillivray]

Moz's index isn't a complete view of the web, but we try to crawl quality sites out there. Our index is always growing. But to be frank, no one -- not even Google -- crawls the entire web. There are just too many pages out there and computing power is expensive. Google crawls the most links simply because Google is a bigger company with more money and more servers and more engineers and who's business depends on serving web pages to everyone.

At Moz, we focus on quality sites because we believe (and hope) our customers and community are focusing on high quality links that are still active, which are going to give them the best SEO results. (Also a huge part of the web is just spam nonsense.) Many SEOs -- and I include myself here -- will use multiple sources of link indexing for the broadest view of the web and their sites. I use Moz's OSE and Google Webmaster Tools (free and big, but includes lots of spam, which can be great if you're fighting a Penguin penalty). Others will use OSE, GWT, and OSE competitors like Majestic and Ahrefs, especially if link building is huge for them and they want to account for every penny. Every index is a bit different.

[KrisIrr]

Yes, it looks like MOZ shows fewer inbound links. But, Google shows I have increased inbound links. Actually, there is a large difference as what MOZ and Google see. Why is that?

[MissThumann]

Mine dropped 3 points too But I feel slightly better now knowing i'm not the only one.  #Smallheartattack

[Mustansar]

It is due to latest Mozscape index on 22nd of June, this has result in drop in DA and PA. I also believe the index include fewer links or url which leads to this drop.it is likely, you've built additional quality/relevant links as you have mentioned, but with the smaller Index these new links, and even previously indexed links, are not being picked up. Therefore, less links are being used to calculate your domain authority score. I would say the drop in your Domain Authority is due to the size of the index.

you can see the update stream just here Mozscape