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
-
Low page impressions
Hey there MOZ Geniuses; While checking my webmaster data I noticed that almost all my Google impressions are generated by the home page, most other content pages are showing virtually no impression data <50 (the home page is showing around 1500 - a couple of the pages are in the 150-200 range). the site has been up for about 8 months now. Traffic on average is about 500 visitors, but I'm seeing very little entry other then the home page. Checking the number Sitemap section 27 of 30 are index Webmaster tools are not reporting errors Webmaster keyword impressions are also extremely low 164 keywords with the highest impression count of 79 and dropping from there. MOZ is show very few minor issues although it says that it crawled 10k pages? -- we only have 30 or so. The answer seems obvious, Google is not showing my content ... the question is why and what steps can I take to analyze this? Could there be a possibility of some type of penalty? I welcome all your suggestions: The site is www.calibersi.com
Technical SEO | | VanadiumInteractive0 -
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 -
Product Pages Outranking Category Pages
Hi, We are noticing an issue where some product pages are outranking our relevant category pages for certain keywords. For a made up example, a "heavy duty widgets" product page might rank for the keyword phrase Heavy Duty Widgets, instead of our Heavy Duty Widgets category page appearing in the SERPs. We've noticed this happening primarily in cases where the name of the product page contains an at least partial match for the desired keyword phrase we want the category page to rank for. However, we've also found isolated cases where the specified keyword points to a completely irrelevent pages instead of the relevant category page. Has anyone encountered a similar issue before, or have any ideas as to what may cause this to happen? Let me know if more clarification of the question is needed. Thanks!
Technical SEO | | ShawnHerrick0 -
We have set up 301 redirects for pages from an old domain, but they aren't working and we are having duplicate content problems - Can you help?
We have several old domains. One is http://www.ccisound.com - Our "real" site is http://www.ccisolutions.com The 301 redirect from the old domain to the new domain works. However, the 301-redirects for interior pages, like: http://www.ccisolund.com/StoreFront/category/cd-duplicators do not work. This URL should redirect to http://www.ccisolutions.com/StoreFront/category/cd-duplicators but as you can see it does not. Our IT director supplied me with this code from the HT Access file in hopes that someone can help point us in the right direction and suggest how we might fix the problem: RewriteCond%{HTTP_HOST} ccisound.com$ [NC] RewriteRule^(.*)$ http://www.ccisolutions.com/$1 [R=301,L] Any ideas on why the 301 redirect isn't happening? Thanks all!
Technical SEO | | danatanseo0 -
Does Yelp pass link juice?
This is probably a profoundly obvious question, but I can't seem to find an explicit answer on the internet, so I'll ask it here: Yelp's links out to local business websites are not nofollow'd, but they go through a javascript-based redirect. My understanding is that javascript redirected links do not pass link juice, so a link from a yelp profile will not directly impact my page authority; however, it looks like yelp does use nofollow judiciously for internal links, so I don't understand why they would allow follow for these "useless" outbound links. Do yelp's javascript-redirected links pass link juice?
Technical SEO | | tvkiley0 -
I can buy a domain from a competitor. Whats the best way to make good use of these links for my existing website
I can buy a domain from a competitor. Whats the best way to make good use of these links for my existing website
Technical SEO | | Archers0 -
Does Google pass link juice a page receives if the URL parameter specifies content and has the Crawl setting in Webmaster Tools set to NO?
The page in question receives a lot of quality traffic but is only relevant to a small percent of my users. I want to keep the link juice received from this page but I do not want it to appear in the SERPs.
Technical SEO | | surveygizmo0 -
.com or .co.uk in UK index? but the .com has higher domain authority...
Hi there i have a .com and a .co.uk for a site that has been around a while. However not much seo has been done on it, i was wonderign do i continue to optimise for the .com or switch to the .co.uk to rank in Google UK index for various search terms. .COM = 40 domain authority .CO.UK - 10 domain authority. Let the debate start 🙂
Technical SEO | | pauledwards0