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
-
Best way to link to multiple location pages
I am a Magician and have multiple location pages for each county I cover. I currently have them linked off the menu under locations/ <county>and also in the footer</county> However I have heard that a link from the page is much stronger, so I am experimenting with removing the Menu & Footer link and just linking to these pages from within the content. It's not really a navigation item and most people come in through search to the right page. Am I diluting the link by having it in the Menu/Page and Footer? I read a long time ago that Google only considers the first link to a page and ignores the rest - is that the case? Thanks Roger https://www.rogerlapin.co.uk/
Technical SEO | | Rogerperk0 -
Duplicated rel=author tags (x 3) on WordPress pages, any issue with this?
Hi,
Technical SEO | | jeffwhitfield
We seem to have duplicated rel=author tags (x 3) on WordPress pages, as we are using Yoast WordPress SEO plugin which adds a rel=author tag into the head of the page and Fancier Author Box plugin which seems to add a further two rel=author tags toward the bottom of the page. I checked the settings for Fancier Author Box and there doesn't seem to be the option to turn rel=author tags off; we need to keep this plugin enabled as we want the two tab functionality of the author bio and latest posts. All three rel=author tags seem to be correctly formatted and Google Structured Data Testing Tool shows that all authorship rel=author markup is correct; is there any issue with having these duplicated rel=author tags on the WordPress pages?
I tried searching the Q&A but couldn't find anything similar enough to what I'm asking above. Many thanks in advance and kind regards.0 -
Moving Some Content From Page A to Page B
Page A has written content, pictures, videos. The written content from Page A is being moved to Page B. When Google crawls the pages next time around will Page B receive the content credit? Will there not be any issues that this content originally belonged to Page A? Page A is not a page I want to rank for (just have great pictures and videos for users). Can I 301 redirect from Page A to B since the written content from A has been deleted or no need? Again, I intent to keep Page A live because good value for users to see pictures and videos.
Technical SEO | | khi50 -
Duplicate Page Title Error passing a php variable
Hi i've searched about this and read about this and i can't get my head around it and could really do with some help. I have a lot of contact buttons which all lead to the same enquiry form and dependant on where it has come from it fills in the enquiry field on the contact form. For example if you are on the airport transfer page it will carry the value so its prefilled in (.php?prt=Airport Transfers). The problem is it's coming up as a duplicate page however its just the 1. I have this problem with quite a few sites and really need to combat this issue. Any help would be very much appreciated. airport-transfers.php
Technical SEO | | i7Creative0 -
Does it make sense to use rel=author on every page?
If you assume that rel=author increases click through rate in SERPs, would it be a good or bad idea to implement it on every page on your site?
Technical SEO | | ProjectLabs0 -
How Much Authority Needed for Page with 1000 Internal Links?
Hypothetically speaking, if you wanted your homepage to have 1000 links, how much Page Rank or link authority would you need at a minimum (in order for Google to crawl all the links on the page)? Here is an example: http://www.khanacademy.org/#browse
Technical SEO | | ProjectLabs0 -
Do you get credit for an external link that points to a page that's being blocked by robots.txt
Hi folks, No one, including me seems to actually know what happens!? To repeat: If site A links to /home.html on site B and site B blocks /home.html in Robots.txt, does site B get credit for that link? Does the link pass PageRank? Will Google still crawl through it? Does the domain get some juice, but not the page? I know there's other ways of doing this properly, but it is interesting no?
Technical SEO | | DaveSottimano0 -
New Domain Page 7 Google but Page 1 Bing & Yahoo
Hi just wondered what other people's experience is with a new domain. Basically have a client with a domain registered end of May this year, so less than 3 months old! The site ranks for his keyword choice (not very competitive), which is in the domain name. For me I'm not at all surprised with Google's low ranking after such a short period but quite surprsied to see it ranking page 1 on Bing and Yahoo. No seo work has been done yet and there are no inbound links. Anyone else have experience of this? Should I be surprised or is that normal in the other two search engines? Thanks in advance Trevor
Technical SEO | | TrevorJones0