On what basis the domain authority will be calculated

[SubhaVaastu]

Dear Moz Community, I am running one website www.SubhaVaastu.com, previously it has 32 DA, suddenly backs to 29. This site is registered in October 2003. Daily updated with the latest content. Maintaining world-class content qualities and its unique. Just last week, we found that DA come down from 32 to 29. What are the reasons for downgraded this DA.

DA, is important as per SEO?.

From where it is created, who creates this DA, either google or MOZ?

How to improve DA, either with the help of directory submissions or any other sources.

What are the uses of DA.

Thank you Community experts.

Regards

Suresh

[samantha.chapman]

Hi there,

Thanks for writing in - Sam from Moz's Help Team here!

That's such a good question, we made an entire resource page about it. (https://moz.com/learn/seo/domain-authority)

There's also a video! Here's a preview:

Domain Authority is a score (on a 100-point scale) developed by Moz that predicts how well a website will rank on search engines. Use Domain Authority when comparing one site to another or tracking the “strength” of your website over time. We calculate this metric by combining all of our other link metrics—linking root domains, number of total links, MozRank, MozTrust, etc.—into a single score.

In terms of DA dropping, we do get a number of questions about this - overall, DA numbers dropping with an index update is a fairly common problem and can be attributed to a few things:

1.You've earned relatively more or less links over the course of the last 30-90 days.
2. You've earned more links, but the highest authority sites have grown their link profile even more.
3. The links you've earned are from places that we haven't seen correlate well with higher Google rankings.
4. We've done a better or worse job crawling sites/pages that have links to you (or don't).

It's a bit difficult to isolate the exact cause of what happened without your own SEO consultant or developer being able to take a dive into this, but you can definitely read more specific information here: https://moz.com/community/q/da-pa-fluctuations-how-to-interpret-apply-understand-these-ml-based-scores if you'd like to understand more about the process:).

A great place to start with improving DA could be to focus on link building! You can learn more about link building here and get a more detailed explanation of Domain Authority through this resource.

In general, I'd recommend keeping in mind that all of these metrics are relative with respect to the other sites included in our index. The metrics will probably have some additional context when compared to sites similar to your own, including your competitors.

Feel free to give those resources a once over to see if they help clarify some of your questions! I hope this helps!