Any penalty for having rel=canonical tags on every page?
-
For some reason every webpage of our website (www.nathosp.com) has a rel=canonical tag. I'm not sure why the previous SEO manager did this, but we don't have any duplicate content that would require a canonical tag.
Should I remove these tags? And if so, what's the advantage - or disadvantage of leaving them in place?
Thank you in advance for your help.
-Josh Fulfer
-
There isn't a direct penalty for having rel="canonical" tags on every page, no, as long as you are correctly utilizing them (i.e. don't set the href of the tag to an invalid or non-existent URL). If there is even the possibility of duplicate content on your website, it is best to use canonical tags.
For websites serving straight HTML files, both http://www.example.com/index.html and http://www.example.com/ likely serve the same content.
If you use a framework like ASP.NET MVC, it would by default return duplicate content for both http://www.example.com/ and http://www.example.com/Home/Index.
Choose one or the other and set your canonical tag to that:
(note: the trailing slash is optional - just be consistent with including it or not)
-
You can use a canonical tag on page A, to point to A, telling that this is the original, teh reason for this is when people scrape your site they will point back home.
i belive thats is what they were getting at
you would only point it at B if B was a duplicate.
-
Ryan - I appreciate your help. My initial thought too was that I could remove it to clean up the code. However, I was unaware that the tag helps with dynamically generated pages - which ours are.
Thank you for your thorough response.
-
as far as i can see josh, the canonical URLs on your site are doing what they should be doing. I havn't looked to deep into it, but it seems like your products all refer back to product category pages, so that is the right way to use them.
-
I have never heard of anyone being penalised for having it on every page. Plus I can't see that ever happening unless it has been implemented incorrectly of course.
-
page A has content about apples. page B has content about bubblegum. Canonical tag states that page B should refer to page A. What is the point of that? all link juice, all ranking potential is passed to page A, even though page B has very different content. So page A MIGHT appear in search results about bubblegum, but page B will not because it is passing all link juice and rank potential to page A about apples. People stop going to page A when looking for bubblegum because it is irrelevant, and bounce rates increase.
Dont think you need documentation to get this. If you have all pages redirecting bots via canonical urls to the SAME page, it is pointless. If you have several article about apples and point them all to page A that is a different story.
-
not sure what you mean here, I have a canonical on every page, I program my sites to dynamicly to do, the reason i do so, is if someone scraps a page, it will have my address in the canonical tag.
I dont know what you mean by not relative to the tag. it just a href, are we talking about the same thing?
rel="canonical" href=http://mydomain.com/>
-
Having canonical tags on pages that don't have any duplicate content is pointless, as it may actually stop you for ranking on keywords specific to pages not relative to the tag.
Please, may you present me a document that assess what are you saying? because it is the first time I hear this thing.
#curious
-
The disadvantage to keeping a canonical tag on a page which does not require it would be, as a rule, you want to present your web page with the least amount of code possible. Unnecessary code causes extra confusion and adds to the processing time of web pages.
I use the canonical tag on all pages, but not everyone agrees. If you would like further support, SEOmoz uses the tag on all pages as well. If you use any CMS, ecommerce software, forum software or any system which generates pages dynamically then I would highly recommend a canonical tag on every page. At times a system will generate pages which you might not be aware of, but a crawler will find.
Sometimes a page will offer a print version, the ability to sort on ascending/descending, and numerous other changes. You might think you only have one version of your page but have many versions which you do not realize exist. A proper canonical tag ensures the correct version of your URL is always offered for indexing, and you avoid duplicate content issues. With that said, if you have a basic html/css/php site and you are 100% confident in your programmer, then it is not necessary.
EDIT: In your case, it seems the canonical tags are performing a necessary function. From your home page I clicked on your featured item and I landed on the following URL:
http://www.nathosp.com/product/r1212_c
You have the identical page offered under another URL: http://www.nathosp.com/product/r1212_c/hotel_towels.
If you were to remove the canonical, you would have duplicate content issues on your site.
-
rel=canonical just passes all link juice from one page to the next, it tells bots to use the page specified in the tag to assess link value and page authority. Having canonical tags on pages that don't have any duplicate content is pointless, as it may actually stop you for ranking on keywords specific to pages not relative to the tag. I would look at it closely or ask the last SEO why they did this before removing them. But by the sounds of it, you dont really need them.
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
-
Magento 1.9 SEO. I have product pages with identical On Page SEO score in the 90's. Some pull up Google page 1 some won't pull up at all. I am searching for the exact title on that page.
I have a website built on Magento 1.9. There are approximately 290,000 part numbers on the site. I am sampling Google SERP results. About 20% of the keywords show up on page 1 position 5 thru 10. 80% don't show up at all. When I do a MOZ page score I get high 80's to 90's. A page score of 89 on one part # may show up on page one, An identical page score on a different part # can't be found on Google. I am searching for the exact part # in the page title. Any thoughts on what may be going on? This seems to me like a Magento SEO issue.
Intermediate & Advanced SEO | | CTOPDS0 -
I Need to put static text every page (600 words) need advice
i need to put static text (about our company brief 600 words) to all content section of pages of our website. I know it's bad for SEO Duplicate Content. But i need to tell google this is my static content and do NOT crawl it. Or something like that. canonical is for whole page but i need to set it up for certain positions of every page. is that possible?
Intermediate & Advanced SEO | | nopsts0 -
Duplicate keyphrases in page titles = penalty?
Hello Mozzers - just looking at a website which has duplicate keyphrases in its page titles... So you have [keyphrase 1] | [exact match Keyphrase 1] Now I happen to know this particular site has suffered a dramatic fall in traffic - the SEO agency working on the site had advised the client to duplicate keyphrases. Hard to believe, huh! What I'm wondering is whether this extensive exact match keyphrase duplication might've been enough to attract a penalty? Your thoughts would be welcome.
Intermediate & Advanced SEO | | McTaggart0 -
Simple Pagination and Rel Canonical
Hello, I am trying to find a solid solution to this. I think it is simple, but trying to think of a good setup for SEO. If you have a paginated result set, page 1, page 2, page 3, page 4. What i am wondering is, should I point my REL CANONICAL page to Page 1 always, so i'm not loosing power from the first page? Domain structure: www.domain.com/search/[term]/page1/
Intermediate & Advanced SEO | | aactive
www.domain.com/search/[term]/page2/ Should I point all pages to page 1, so I don't get watered down as we go farther into the site? Thoughts?0 -
Why is Alt tag occurances so high in the on page reporter?
I am trying to understand why the on page reporter shows so many occurrences of alt tags containing my keywords. Can anyone shed any light? This is the URL that's in question. http://www.towelsrus.co.uk/towels-hand-towels/aztex/turkish-cotton-hand-towel_ct472bd182pd2745.htm yMlM5.png
Intermediate & Advanced SEO | | Towelsrus0 -
Do I need to use canonical tags if I'm 301 redirecting pages?
I just took a job about three months and one of the first things I wanted to do was restructure the site. The current structure is solution based but I am moving it toward a product focus. The problem I'm having is the CMS I'm using isn't the greatest (and yes I've brought this up to my CMS provider). It creates multiple URL's for the same page. For example, these two urls are the same page: (note: these aren't the actual urls, I just made them up for demonstration purposes) http://www.website.com/home/meet-us/team-leaders/boss-man/
Intermediate & Advanced SEO | | Omnipress
http://www.website.com/home/meet-us/team-leaders/boss-man/bossman.cmsx (I know this is terrible, and once our contract is up we'll be looking at a different provider) So clearly I need to set up canonical tags for the last two pages that look like this: With the new site restructure, do I need to put a canonical tag on the second page to tell the search engine that it's the same as the first, since I'll be changing the category it's in? For Example: http://www.website.com/home/meet-us/team-leaders/boss-man/ will become http://www.website.com/home/MEET-OUR-TEAM/team-leaders/boss-man My overall question is, do I need to spend the time to run through our entire site and do canonical tags AND 301 redirects to the new page, or can I just simply redirect both of them to the new page? I hope this makes sense. Your help is greatly appreciated!!0 -
Canonical Meta Tag
Can someone explain how this works and how necessary is it? For example, I have a new client, who is ranking WITHOUT the www in their domain, but they have a good deal of backlinks already that have www in it. When I set up google webmaster tools I made 2, one for WWW and one for WITHOUT and there are diffenet numbers of backlinks for each. I have no idea what do about this or if I should even do anything. Thanks
Intermediate & Advanced SEO | | TheGrid0 -
Maximum of 100 links on a page vs rel="nofollow"
All, I read within the SEOmoz blog that search engines consider 100 links on a page to be plenty, and we should try (where possible) to keep within the 100 limit. My question is; when a rel="nofollow" attribute is given to a link, does that link still count towards your maximum 100? Many thanks Guy
Intermediate & Advanced SEO | | Horizon0