Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Comparing Domain Authority Scores
-
Since your scale (like PageRank) is a logarithmic scale, it makes it hard to judge the distance between 2 scores. Can you give me a rule of thumb. For PageRank, each jump is an exponential jump - so that a PR6 is perhaps 10 times stronger than a PR5.
What is the log base that SEOMoz uses. Should I assume that a 60 is 10 times stronger than a 50?
This is important when it comes to measuring progress because growth is going to get more difficult as you move up the scale and I need to communicate the distance between our current Authority score and our goal.
Thank You!
-
Talked to Dr. Matt, and he said that, if you just want an estimate, take the log (base 10). You'll get a value from zero to two that will be roughly linear, and then you can scale it up to whatever range you need.
-
Hi Peter,
I have a follow up question to your reply; I want to try and use DA together with other linear metrics to create my own value that I can use for different purposes.
Considering your answer above it seems to me, and I have very little mathematical knowledge, that there is no exact log base I can use to get an "exact" representation of what a DA value is trying to express. Does that seem like a correct understanding?
Then, from a practical point of view, how would you recommend I convert DA values to a linear scale? Close enough is good enough i guess.
Thanks //David
-
I'm afraid the answer is "it's complicated" - here's the longer version, from Dr. Matt Peters, our head of Data Science:
"PA and DA are the output from a machine learning model that we then rescale to values between 1-100. The raw output from the model is dimensionless and doesn't have any interesting meaning. The rescaling is linear, but the inputs to the model are rescaled logarithmically before being used in the model. We use the natural log (base e) but the base is pretty arbitrary since one can transform from one base to another by changing coefficients, and the coefficients themselves are set in a regression. The key point is that since the inputs have a log applied to them it is much harder to increase DA from say 70 to 80 then it is from 30 to 40."
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Domain still not being found in search
Hi guys, I've been handed a client who needs some seo work. I've tweaked one of their pages to focus on a chosen keywords about 4 months back but still the site is not even visible using the new Domain Analysis tool from moz and it still won't rank at all for the keywords. Am I missing something here? Is there something blocking the SERP from listing the website? I've ran a site: search on Google and it returns 283 results on the website. It's puzzling me as there clearly is something stopping it from being ranked. The domain name in question is: https://cloud9inecommunications.co.uk Thanks in advance.
Moz Pro | | Easigrass1 -
What is the logarithmic scale used for domain authority?
I want to quantify how much better a score of 80 is compared to 60. Or 60 compared to 30 etc.... What is the logarithm base? Thanks, Rik
Moz Pro | | garypropellernet0 -
In alt tag of a image can we use #hashtag or domain.com ? Is that good SEO or not allowed ?
Some of the Google Search shows a title has a hashtag of an article, which contain keyword and while tweeting them, the title which has a hashtag automatically very good used for getting traffic to the blog. And other one, can we use the hash tag inside the alt attribute ? Or our domain name with .com in it. Like Google.com or #Google ?
Moz Pro | | Esaky0 -
How is domain authority related to country top level domains?
I've noticed that for some country top level domains (tld) the domain authority returned by open site explorer is based on the domain that has been registered within the tld. For example, domainname.co.uk provides a domain authority specific to the domain. However, for some other country top level domains, this does not appear to be the case. Examples I have found include: domainname.co.nr domainname.co.pt domainname.co.ee For these top level domains the domain authority seems to be the same for every domainname, seemingly implying the domain authority is for the top level domain itself rather than for the domain. Is this a common situation for many country top level domains, so that what I see going in here is the tip of a large iceberg, or does this situation just apply to a very isolated set of country top level domains?
Moz Pro | | MichaelCorfman0 -
Domain.com and domain.com/index.html duplicate content in reports even with rewrite on
I have a site that was recently hit by the Google penguin update and dropped a page back. When running the site through seomoz tools, I keep getting duplicate content in the reports for domain.com and domain.com/index.html, even though I have a 301 rewrite condition. When I test the site, domain.com/index.html redirects to domain.com for all directories and root. I don't understand how my index page can still get flagged as duplicate content. I also have a redirect from domain.com to www.domain.com. Is there anything else I need to do or add to my htaccess file? Appreciate any clarification on this.
Moz Pro | | anthonytjm0 -
How fast can page authority be grown
I understand that it is easier to rank for a particular keyword given a higher DA score. How fast can page authority be established and grown for a given keyword if DA is equal to 10/20/30/50? What are the relative measures that dictate the establishment and growth of this authority? Can it be enumerated to a percentage of domain links? or a percentage of domain links given an assumed C-Block ratio? For example you have a website with DA of 40, and you want to target a new keyword, the average PA of the top ranked pages is 30, the average domain links are 1,000, and the average number of linking domains is 250 - if you aim to build 1,000 links per month from 500 linking domains, how fast can you approximate the establishment of page authority for the keyword?
Moz Pro | | NickEubanks0