How much domain authority is passed on through a link from a page with low authority?
-
Hello,
Let's say that there is a link to site A from site B. The domain authority of site B is 85, but the link is on a page that has a page authority of only 1. Does much authority get passed along from site B to site A? (Let's assume site A has a domain authority of 35, if that's relevant.)
Thank you!
-
Thanks, Federico.
-
Thank you, Keri!
-
Thank you very much, Dr. Meyers! This was extremely helpful.
-
Unfortunately, Dr. Matt's out of town, so this answer won't be as thorough as I'd like, but the gist of it is that we factor in both DA and PA to some degree. If a site has very high DA but a very low PA (as in your example), we're going to bias somewhat toward the DA, as we believe Google sometimes does (a virtually unknown page on Wikipedia can rank very well, for example). Likewise, a high-PA page on a site with low DA may pass more through the PA, because (hopefully) that page has some legitimate authority.
It's a bit more complex, because DA and PA are related as well, so they do influence each other to some degree. On larger sites, the influence of any single page's PA is small, but the influence can be more obvious on smaller sites.
Putting aside our math, I think a link from a low-authority page on a high-authority site can be worthwhile. Look at directories, like DMOZ. I think it's important to make sure the low-PA page is indexed (some DMOZ pages aren't, because they're buried so deeply in the link structure), and I wouldn't get hung up on a link from a high-DA site. It's ultimately just one link. I wouldn't dismiss it as useless either, though. There's some amount of site/page balance in the mix and Google doesn't rely on only one type of authority.
-
I'm checking with Dr. Matt Peters, head of our Data Science team. It's less about secrecy and more that DA/PA are based on machine learning and have gotten a bit complex. Still, I suspect we can give you a general sense of how DA/PA pass through links. Posting this because I suspect an answer may take a day or two.
-
Well, it is a bit late for regular office hours for most Moz staff, so you may not hear an answer until tomorrow. The answer may also include "remember, what the search engines think is what matters", but you should get an answer with at least some information in the next couple of days.
-
and I am sure Moz will not answer this at all!
-
It is, but no one outside Moz can answer that, there are several metrics that affect authority passing, and I guess that most of those metrics and algos are property of Moz and most likely secret to prevent abuse.
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
-
Trying to find all internal links to a specific page (without index)
Hi guys -- Still waiting on Moz to index a page of mine. We launched a new site over two months ago. In the meantime, I really just need a list of internal links to a specific page because I want to change its URL. Does anybody know how to find that list (of internal links to 1 of my pages) without the Moz index? I appreciate the help!
Technical SEO | | marchexmarketingmcc1 -
Best practice for multiple domain links
A site i'm working on has about 12 language domains - .es, it, .de etc. On each page of every domain the header has links to every homepage. At the moment these are all set to no-follow as an initial step to stop potential link profile issues spreading around. Moving forward i'm not totally sure how to handle these links. On one side I see and agree that no-follow is not necessary, but do-follow is just filtering out and weakening link juice. What is the best way to handle this scenario?
Technical SEO | | MickEdwards0 -
Home page indexed but not ranking...interior pages with thin content outrank home page??
I have a Joomla site with a home page that I can't get to rank for anything beyond the company name @ Google - the site works fine @ Bing and Yahoo. The interior pages will rank all day long but the home page never shows up in the results. I have checked the page code out in every tool that I know about and have had no luck....by all account it should be good to go...any thoughts/comments/help would be greatly appreciated. The site is http://www.selectivedesigns.com Thanks! Greg
Technical SEO | | DougHosmer0 -
301 Link Authority 100% Transfer
Our web designer wants to change our pages from the .htm to .html extension. Would 301 redirects transfer our link juice to rankings are not harmed?
Technical SEO | | TheDude0 -
Diagnostic says too many links on a page and most of the pages are from blog entries. Are tags considered links? How do I decrease links?
I just ran my first diagnostic on my site and the results came back were negative in the area of too many links one a page. There were also quite a few 404 errors. What is the best way to fix these problems? Most of the pages with too many links are from blog posts, are the tags counted as well and is this the reason for too many links?
Technical SEO | | Newport10300 -
How to measure number of links out from a page
Following on from earlier Q, what do you all use to count links out from a page. I believe there is a bing tool which does this, though rather than a list of sites a simple number would be ideal?
Technical SEO | | seanmccauley0 -
What do you do about links to constantly moving pages?
One of the sites I work for is an employment site, they have a job database and the job pages tend to get links. The problem is that every time one of these jobs is filled, the job page goes away. What should I do to keep the value from these links?
Technical SEO | | MarloSchneider0