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
-
Linking to my Site so I should Link Back?
I remember hearing a few years ago that it was a good practice to link back to a site that was linking to you. My company's site was referenced and linked to in a news article. The news company has an above average domain authority, which is pretty good for my company's backlink profile. Is it still or was ever a "best practice" to link back to this website/domain? I feel like linking back was a best practice, but when I try to search this, all I get back is backlinking 101 and backlinking articles. Nothing really answering my question straight forward. Thanks for any help.
Technical SEO | | aua0 -
Subdirectories and Domain Authority
Hello, A subdirectory consolidates domain authority vs a ccTLD approach. However, for example, if a domain has been well established in the UK i.e example.com, is that domains authority diluted if a subdirectory is created i.e example.com/es Will some of the link juice attained on www.example.com be shared throughout www.example.com/es and therefore initially impact search visibility for www.example.com? I understand it works both ways as well, as any links attained on www.example.com/es will benefit the example.com domain. Thanks
Technical SEO | | SEONOW1230 -
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 -
Correct linking to the /index of a site and subfolders: what's the best practice? link to: domain.com/ or domain.com/index.html ?
Dear all, starting with my .htaccess file: RewriteEngine On
Technical SEO | | inlinear
RewriteCond %{HTTP_HOST} ^www.inlinear.com$ [NC]
RewriteRule ^(.*)$ http://inlinear.com/$1 [R=301,L] RewriteCond %{THE_REQUEST} ^./index.html
RewriteRule ^(.)index.html$ http://inlinear.com/ [R=301,L] 1. I redirect all URL-requests with www. to the non www-version...
2. all requests with "index.html" will be redirected to "domain.com/" My questions are: A) When linking from a page to my frontpage (home) the best practice is?: "http://domain.com/" the best and NOT: "http://domain.com/index.php" B) When linking to the index of a subfolder "http://domain.com/products/index.php" I should link also to: "http://domain.com/products/" and not put also the index.php..., right? C) When I define the canonical ULR, should I also define it just: "http://domain.com/products/" or in this case I should link to the definite file: "http://domain.com/products**/index.php**" Is A) B) the best practice? and C) ? Thanks for all replies! 🙂
Holger0 -
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 -
Can I use canonical tags to merge property map pages and availability pages to their counterpart overview pages?
I have a property website, for each property are 4-5 tabs each with their own URL, these pages include the overview page which is content rich, and auxilliary pages such as maps, availability, can I use a canonical tag to merge the tabs with very little content to their corresponding overview page which is content rich? I.e. www.mywebsite.co.uk/property-1/overview This page has tabs for map, town info, availability which all have their own url i.e. www.mywebsite.co.uk/property-1/map
Technical SEO | | assertive-media
www.mywebsite.co.uk/property-1/availability
www.mywebsite.co.uk/property-1/towninfo Because these auxilary pages do not contain much content can I place a canonical tag in them pointing back to the content rich overview page at www.mywebsite.co.uk/property-1/overview?0 -
Seomoz api for domains working, for domains+directory not?
We're working on a tool using the seomoz api ... for domains we're always getting the right values, but for longer URLs we're having troubles ... Example: http://www.seomoz.org/blog/6-reasons-why-qa-sites-can-boost-your-seo-in-2011-despite-googles-farmer-update-12160 won't work http://www.seomoz.org/blog works Any idea what we might be doing wrong?
Technical SEO | | gmellak0