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.
Why some domains and sub-domains have same DA, but some others don't?
-
Hi
I noticed for some blog providers in my country, which provide a sub-domian address for their blogs. the sub-domain authority is exactly as the main domain. Whereas, for some other blog providers every subdomain has its different and lower authority.
for example "ffff.blog.ir" and "blog.ir" both have domain authority of 60. It noteworthy to mention that the "ffff.blog.ir" does not even exist!
This is while mihanblog.com and hfilm.mihanblog.com has diffrent page authority.
-
Hey!
DA scores are specific to the root domain, we are not taking into account a subdomain. So even if you search a subdomain that doesn't exist (ffff.blog.ir), DA score is still only relevant to the root domain (blog.ir) which does exist.
Page Authority on the other hand is specific to the exact page you are searching, so it makes sense that mihanblog.com and hfilm.mihanblog.com would have different page authority scores are they are separate pages.
Hope that helps, let me know if you have further questions.
-
Am pretty sure that Moz just unifies DA stats in some circumstances when they have no 'actual' data for the subdomain in question. Sites which are very important, which have a number of sub-domains (but not hundreds or thousands) often render different results for DA metrics. For some blog platforms (blogger is a good example, also "blogname.wordpress.com" WordPress hosted blogs) - they have thousands or hundreds of thousands of sub-domains and Moz can't index all of them
In these situations, if Moz comes across a subdomain which is well-linked across the web it will separate it out and ascribe unique values. For the rest (of which Moz holds no data), it probably just unifies the DA metric with the root domain
It's a symptom of an incomplete index of the web. That being said, no one has a complete index of the web - you have to work with what you got
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
-
My "search visibility" went from 3% to 0% and I don't know why.
My search visibility on here went from 3.5% to 3.7% to 0% to 0.03% and now 0.05% in a matter of 1 month and I do not know why. I make changes every week to see if I can get higher on google results. I do well with one website which is for a medical office that has been open for years. This new one where the office has only been open a few months I am having trouble. We aren't getting calls like I am hoping we would. In fact the only one we did receive I believe is because we were closest to him in proximity on google maps. I am also having some trouble with the "Links" aspect of SEO. Everywhere I see to get linked it seems you have to pay. We are a medical office we aren't selling products so not many Blogs would want to talk about us. Any help that could assist me with getting a higher rank on google would be greatly appreciated. Also any help with getting the search visibility up would be great as well.
Intermediate & Advanced SEO | | benjaminleemd1 -
One of my Friend's website Domain Authority is Reducing? What could be the reason?
Hello Guys, One of my friend's website domain authority is decreasing since they have moved their domain from HTTP to https.
Intermediate & Advanced SEO | | Max_
There is another problem that his blog is on subfolder with HTTP.
So, can you guys please tell me how to fix this issue and also it's losing some of the rankings like 2-5 positions down. Here is website URL: myfitfuel.in/
here is the blog URL: myfitfuel.in/mffblog/0 -
Does Google Read URL's if they include a # tag? Re: SEO Value of Clean Url's
An ECWID rep stated in regards to an inquiry about how the ECWID url's are not customizable, that "an important thing is that it doesn't matter what these URLs look like, because search engines don't read anything after that # in URLs. " Example http://www.runningboards4less.com/general-motors#!/Classic-Pro-Series-Extruded-2/p/28043025/category=6593891 Basically all of this: #!/Classic-Pro-Series-Extruded-2/p/28043025/category=6593891 That is a snippet out of a conversation where ECWID said that dirty urls don't matter beyond a hashtag... Is that true? I haven't found any rule that Google or other search engines (Google is really the most important) don't index, read, or place value on the part of the url after a # tag.
Intermediate & Advanced SEO | | Atlanta-SMO0 -
Can you redirect specific sub domain URLs?
ello! We host our PDFs, Images, CSS all in a sub domain. For the question, let's call this sub.cyto.com. I've noticed a particular PDF doing really well, infact it has gathered valuable external links from high authoritative sites. To top it off, it gets good visits. I've been going back and forth with our developers to move this PDF to a subfolder structure.
Intermediate & Advanced SEO | | Bio-RadAbs
For example: www.cyto.com/document/xxxx.pdf In my perspective, if I move this and set up a permanent redirect, then all the external links the PDF gathered, link juice and future visits will be attributed to the main website. Since the PDF is existing in the subdomain, I can't even track direct visits nor get the link juice. It appears in top position of Google as well. My developer says it is better to keep images, pdf, css in the subdomain. I see his point and an idea I have is to: convert the pdf to a webpage. Set up a 301 redirect from the existing subdomain to this webpage Upload the pdf with a new name and link to it from the webpage, so users can download if they choose to. This should give me the existing rank juice. However, my question is whether you can set up a 301 redirect for just a single subdomain URL to a folder structure URL? sub.cyto.com/xxx.pdf to www.cyto.com/document/xxxx.pdf?0 -
Best way to block a sub-domain from being indexed
Hello, The search engines have indexed a sub-domain I did not want indexed its on old.domain.com and dev.domain.com - I was going to password them but is there a best practice way to block them. My main domain default robots.txt says :- Sitemap: http://www.domain.com/sitemap.xml global User-agent: *
Intermediate & Advanced SEO | | JohnW-UK
Disallow: /cgi-bin/
Disallow: /wp-admin/
Disallow: /wp-includes/
Disallow: /wp-content/plugins/
Disallow: /wp-content/cache/
Disallow: /wp-content/themes/
Disallow: /trackback/
Disallow: /feed/
Disallow: /comments/
Disallow: /category//
Disallow: */trackback/
Disallow: */feed/
Disallow: /comments/
Disallow: /?0 -
Should I 'nofollow' links between my own sites?
We have five sites which are largely unrelated but for cross-promotional purpose our company wishes to cross link between all our sites, possibly in the footer. I have warned about potential consequences of cross-linking in this way and certainly don't want our sites to be viewed as some sort of 'link ring' if they all link to one another. Just wondering if linking between sites you own really is that much of an issue and whether we should 'nofollow' the links in order to prevent being slapped with any sort of penalty for cross-linking.
Intermediate & Advanced SEO | | simon_realbuzz0 -
SEO value in multiple backlinks from same domain and from various sub-domains.
A site has a link to my site as one of their main tabs, which means whenever a user clicks through to another page within the site, my link - being a main tab - is there. This creates thousands of links from this site. How does Google treat this? Do we have a rough formula estimate. In other words, assume it creates 1,000 backlinks would the SEO value be around the same as if I had just 2 link total as a main tab, but on 2 different non-related sites? Or, does it actually count fully as 1,000 links? Links from various sub-domains. Several .EDU's are linking to my site. Different schools within the overall same university. Example: nursing.abc.edu links to my site, but so does business.abc.edu. For SEO does that count as much as if I had links from complete non-related universities, or would Google evaluate that these links are related (since same main domain) and that will discount any links more than 1 to some extent? If discounted, then what do we estimate the discount to be? thank yoyu
Intermediate & Advanced SEO | | knielsen1