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.
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
-
How effective are 301 redirects in passing page rank?
I have a blog which is ranking well for certain terms, and would like to repurpose it to better explain these terms it is ranking for, including updating the url to the new term the blog will be about. The plan being to 301 redirect the old url to new. In the past, I've done this with other pages, and have actually lost much of the rankings that I had earned on the original URL. What is your take on this? Maybe repurpose blog, but maintain original URL just to be on the safe side? Thanks
Technical SEO | | CitimarineMoz0 -
1000 Pages on old website. What to do with the 301 redirects for this domain?
Hi Moz Community, I have a 301 redirect question... I just acquired an old domain: Totally in my niche Domain is 14 years old Website exists of 1000 pages Great amount of backlinks Website is offline since about 2 weeks Will place a new website online asap with new url structure For the 50 best scoring pages I wrote a new, but fully comparable/related article. I will put a 301 redirect from those old to the new pages. My question: What to do with the 950 other url's? Should I put a 301 redirect to the homepage? Should I forward those pages to the 404 page? Should I divide the 950 url's with a 301 redirect to the 50 new ones? Another solution maybe? Any idea what would be the best solution so we can save as much Google juice as possible? Thanks in advance!
Technical SEO | | snorkel0 -
Home Page Ranking Instead of Service Pages
Hi everyone! I've noticed that many of our clients have pages addressing specific queries related to specific services on their websites, but that the Home Page is increasingly showing as the "ranking" page. For example, a plastic surgeon we work with has a page specifically talking about his breast augmentation procedure for Miami, FL but instead of THAT page showing in the search results, Google is using his home page. Noticing this across the board. Any insights? Should we still be optimizing these specific service pages? Should I be spending time trying to make sure Google ranks the page specifically addressing that query because it SHOULD perform better? Thanks for the help. Confused SEO :/, Ricky Shockley
Technical SEO | | RickyShockley0 -
Splitting Page Authority with two URLs for the same page.
Hello guys, My website is currently holding two different URLs for the same page and I am under the impression such set up is dividing my Page Authority and Link Juice. We currently have the following page with both URLs below: www.wbresearch.com/soldiertechnologyusa/home.aspx
Technical SEO | | JoaoPdaCosta-WBR
www.wbresearch.com/soldiertechnologyusa/ Analysing the page authority and backlinks I identified that we are splitting the amount of backlinks (links from sites, social media and therefore authority). "/home.aspx"
PA: 67
Linking Root Domains: 52
Total Links: 272 "/"
PA: 64
Linking Root Domains: 29
Total Links: 128 I am under the impression that if the URLs were the same we would maximise our backlinks and therefore page authority. My Question: How can I fix this? Should I have a 301 redirect from the page "/" to the "/home.aspx" therefore passing the authority and link juice of “/” directly to “/homes.aspx”? Trying to gather thoughts and ideas on this, suggestions are much appreciated? Thanks!0 -
Do web pages have to be linked to a menu?
I have a situation where people search for terms like, say 1978 one dollar bill. Even though there never was a 1978 one dollar bill. I want to make a page to capture these searches but since there wasn't such a thing as a one dollar bill I don't want it connected to the rest of my content which is reality based. Does that make sense? Anyway, my question is, can I publish pages that aren't linked to my menu structure but that will be searchable or, am I going to have to figure out a way to make these oddball pages accessible through my menu?
Technical SEO | | Banknotes0 -
How to remove the 4XX Client error,Too many links in a single page Warning and Cannonical Notices.
Firstly,I am getting around 12 Errors in the category 4xx Client error. The description says that this is either bad or a broken link.How can I repair this ? Secondly, I am getting lots of warnings related to too many page links of a single page.I want to know how to tackle this ? Finally, I don't understand the basics of Cannonical notices.I have around 12 notices of this kind which I want to remove too. Please help me out in this regard. Thank you beforehand. Amit Ganguly http://aamthoughts.blogspot.com - Sustainable Sphere
Technical SEO | | amit.ganguly0 -
Do Backlinks to a PDF help with overall authority/link juice for the rest of the domain?
We are working on a website that has some high-quality industry articles available on their website. For each article, there is an abstract with a link to the PDF which is hosted on the domain. We have found in Analytics that a lot of sites link directly to the PDF and not the webpage that has the abstract of the article. Can we get any benefit from a direct PDF link? Or do we need to modify our strategy?
Technical SEO | | MattAaron0 -
How to Redirect only specific pages to new domain
My HTACCESS FILE IS AS FOLLOWS: rewriteengine on
Technical SEO | | askthetrainer
rewritecond %{HTTP_HOST} ^mydomain.com$
rewriterule ^mydomain/(.*)$ "http://www.mydomain.com/$1" [R=301,L] #4d864805b49b5 I want to move ONLY specific pages from this domain to a new domain How do I edit my HTACCESS (which redirects http:// to www.) to move specific pages from old domain (which I have to delete) to new domain.... I.e. http://mydomaon.com/move.html needs to move to http://mynewdomain.com/move.html Where i can delete the original domains0