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
-
Redirect multiple domains to 1 domain or not?
Hi there, I have client who has multiple domains that already have some PA and DA. Problem is that most websites have the same content and rank better on different keywords.
Technical SEO | | Leaf-a-mark
I want to redirect all the websites to 1 domain because it’s easier to manage and it removes any duplicate content. Question is if I redirect domain x to domain y do the rankings of domain x increase on domain y? Or is it better to keep domain x separately to generate more referral traffic to domain y? Thanks in advance! Cheers0 -
Should I noindex my blog's tag, category, and author pages
Hi there, Is it a good idea to no index tag, category, and author pages on blogs? The tag pages sometimes have duplicate content. And the category and author pages aren't really optimized for any search term. Just curious what others think. Thanks!
Technical SEO | | Rignite0 -
Updating inbound links vs. 301 redirecting the page they link to
Hi everyone, I'm preparing myself for a website redesign and finding conflicting information about inbound links and 301 redirects. If I have a URL (we'll say website.com/website) that is linked to by outside sources, should I get those outside sources to update their links when I change the URL to website.com/webpage? Or is it just as effective from a link juice perspective to simply 301 redirect the old page to the new page? Are there any other implications to this choice that I may want to consider? Thanks!
Technical SEO | | Liggins0 -
Redirecting root domain to a page based on user login
We have our main URL redirecting non-logged in users to a specific page and logged in users are directed to their dashboard when going to the main URL. We find this to be the most user-friendly, however, this is all being picked up as a 302 redirect. I am trying to advise on the ideal way to accomplish this, but I am not having much luck in my search for information. I believe we are going to put a true homepage at the root domain and simply redirect logged in users as usual when they hit the URL, but I'm still concerned this will cause issues with Google and other search engines. Anyone have experience with domains that need to work in this manner? Thank you! Anna
Technical SEO | | annalytical0 -
Is the Authority of Individual Pages Diluted When You Add New Pages?
I was wondering if the authority of individual pages is diluted when you add new pages (in Google's view). Suppose your site had 100 pages and you added 100 new pages (without getting any new links). Would the average authority of the original pages significantly decrease and result in a drop in search traffic to the original pages? Do you worry that adding more pages will hurt pages that were previously published?
Technical SEO | | Charlessipe0 -
Ok to internally link to pages with NOINDEX?
I manage a directory site with hundreds of thousands of indexed pages. I want to remove a significant number of these pages from the index using NOINDEX and have 2 questions about this: 1. Is NOINDEX the most effective way to remove large numbers of pages from Google's index? 2. The IA of our site means that we will have thousands of internal links pointing to these noindexed pages if we make this change. Is it a problem to link to pages with a noindex directive on them? Thanks in advance for all responses.
Technical SEO | | OMGPyrmont0 -
Domain authority and keyword difficulty
I know there are too many variables for a certain answer, however do people take their domain authority into account when using keyword difficulty tool? I have a new domain which only has a score of seven at the moment. When using the keyword searching tool what is the maximum difficulty level keywords people would target initially? Obviously I would seek to increase the difficulty of the words over time but to start off its a hard choice between keywords which can be ranked for in a reasonable period of time and the keywords which are getting enough traffic to make the effort worthwhile.
Technical SEO | | Grumpy_Carl0 -
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