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
-
Disavow links old links
We have built a lot of sites and there a few sites we no longer manage or want any association with. When I have looked at webmasters I can see 20 to 200+ odd links back to our site. The page however at source has no reference to our website. I have searched the code but there isn't anything. Is it safe to disavow these or just leave them?
Technical SEO | | Cocoonfxmedia0 -
Spammers created bad links to old hacked domain, now redirected to our new domain. Advice?
My client had an old site hacked (let's call it "myolddomain.com") and the hackers created many links in other hacked sites with links such as http://myolddomain.com/styless.asp?jordan-12-taxi-kids-cheap-T8927.html The old myolddomain.com site was redirected to a different new site since then, but we still see over a thousand spam links showing up in the new site's Search Console 404 crawl errors report. Also, using the links: operator in google search, we see many results of spam links. Should we be worried about these bad links pointing to our old site and redirecting to 404s on the new site? What is the best recommendation to clean them up? Ignore? 410s? Other? I'm seeing conflicting advice out there. The old site is hosted by the client's previous web developer who doesn't want to clean anything up on their end without an ongoing hosting contract. So beyond turning redirects on or off, the client doesn't want to pay for any additional hosting. So we don't have much control over anything related to "myolddomain.com". 😞 Thanks in advance for any assistance!
Technical SEO | | usDragons0 -
Strange problem with basic html anchor tag linking to my domain
I have some old valuable followed links from high ranking domains and I noticed from moz reports they are reporting 404.Visually they looked fne but when I clicked on those they indeed were generating 404. When I researched further they are defined as My domain.com Notice there is extra space between "/" and the closing quote. It turns out it is sending "www.mydomain.com/ " to browsers. Any ideas How to solve this? If I should put a perm redirect in apache, how do I deal with these "%C2%A0" characters. It seems the issue is happening at more than one remote domain.
Technical SEO | | Maayboli0 -
"One Page With Two Links To Same Page; We Counted The First Link" Is this true?
I read this to day http://searchengineland.com/googles-matt-cutts-one-page-two-links-page-counted-first-link-192718 I thought to myself, yep, thats what I been reading in Moz for years ( pitty Matt could not confirm that still the case for 2014) But reading though the comments Michael Martinez of http://www.seo-theory.com/ pointed out that Mat says "...the last time I checked, was 2009, and back then -- uh, we might, for example, only have selected one of the links from a given page."
Technical SEO | | PaddyDisplays
Which would imply that is does not not mean it always the first link. Michael goes on to say "Back in 2008 when Rand WRONGLY claimed that Google was only counting the first link (I shared results of a test where it passed anchor text from TWO links on the same page)" then goes on to say " In practice the search engine sometimes skipped over links and took anchor text from a second or third link down the page." For me this is significant. I know people that have had "SEO experts" recommend that they should have a blog attached to there e-commence site and post blog posts (with no real interest for readers) with anchor text links to you landing pages. I thought that posting blog post just for anchor text link was a waste of time if you are already linking to the landing page with in a main navigation as google would see that link first. But if Michael is correct then these type of blog posts anchor text link blog posts would have value But who is' right Rand or Michael?0 -
Dealing with high link juice/low value pages?
How do people deal with low value pages on sites which tend to pool pagerank and internal links? For example log in pages, copyright, privacy notice pages, etc. I know recently Matt Cutts did a video saying don't worry about them, and in the past we all know various strategies like nofollow, etc. were effective but no more. Are there any other tactics or techniques with dealing with these pages and leveraging them for SEO benefit? Maybe having internal links on these pages to strategically pass off some of the link juice?
Technical SEO | | IrvCo_Interactive0 -
Is it good to have a few outbound links to good authority sites?
my site has less than 3 OBLs. (do follow) is it a good idea to give a couple do follow links to authoritative sites for domain authority purposes? thanks guys!
Technical SEO | | tm46150 -
Page Indexing increase when I request Google Site Link demote
Hi there, Has anyone seen a page crawling increase in Google Web Master Tools when they have requested a site link demotion? I did this around the 23rd of March, the next day I started to see page crawling rise and rise and report a very visible spike in activity and to this day is still relatively high. From memory I have asked about this in SEOMOZ Q&A a couple of years ago in and was told that page crawl activity is a good thing - ok fine, no argument. However at the nearly in the same period I have noticed that my primary keyword rank for my home page has dropped away to something in the region of 4th page on Google US and since March has stayed there. However the exact same query in Google UK (Using SEOMOZ Rank Checker for this) has remained the same position (around 11th) - it has barely moved. I decided to request an undemote on GWT for this page link and the page crawl started to drop but not to the level before March 23rd. However the rank situation for this keyword term has not changed, the content on our website has not changed but something has come adrift with our US ranks. Using Open Site Explorer not one competitor listed has a higher domain authority than our site, page authority, domain links you name it but they sit there in first page. Sorry the above is a little bit of frustration, this question is not impulsive I have sat for weeks analyzing causes and effects but cannot see why this disparity is happening between the 2 country ranks when it has never happened for this length of time before. Ironically we are still number one in the United States for a keyword phrase which I moved away from over a month ago and do not refer to this phrase at all on our index page!! Bizarre. Granted, site link demotion may have no correlation to the KW ranking impact but looking at activities carried out on the site and timing of the page crawling. This is the only sizable factor I can identify that could be the cause. Oh! and the SEOMOZ 'On-Page Optimization Tool' reports that the home page gets an 'A' for this KW term. I have however this week commented out the canonical tag for the moment in the index page header to see if this has any effect. Why? Because as this was another (if not minor) change I employed to get the site to an 'A' credit with the tool. Any ideas, help appreciated as to what could be causing the rank differences. One final note the North American ranks initially were high, circa 11-12th but then consequently dropped away to 4th page but not the UK rankings, they witnessed no impact. Sorry one final thing, the rank in the US is my statistical outlier, using Google Analytics I have an average rank position of about 3 across all countries where our company appears for this term. Include the US and it pushes the average to 8/9th. Thanks David
Technical SEO | | David-E-Carey0 -
Limit number of links in a page, how to build the menu?
Hi, One of the first SEOMoz tool recommand to me, is to avoid multiple links on the same page. This is fully true, i've more than 600 internal links placed in a menu on the header.
Technical SEO | | vdgvince
This means that each page contains these 600 links at least. User-experience wise, i need to keep this multi-level menu accessible. What would you suggest me ? => No-follow on the links would be useful and not penalizing (if i still have other do-follow links to these pages) => Javascript menu, so that i can't be crawled by google => Any other suggestion? Thank you in advance!0