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.
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
-
Pages canonicaled to another appearing before the canonical on google searches
Hello, When I do this google search, this page(amandine roses category) appears before the one it is canonical-ed to(this multi-product version of amandine roses). This happens often with this multi-product template, where they don't rank as well as their category version(that are canonical to the multi-product version). Can someone maybe point us in the right direction on what the issue may be? What can be improved?
Intermediate & Advanced SEO | | globalrose.com0 -
Canonical tags for duplicate listings
Hi there, We are restructuring a website. The website originally lists jobs that will have duplicate content. We have tried to ask the client not to use duplicates but apparently their industry is not something they can control. The recommendations I had is to have categories (which will have the idea description for a group of jobs), and the job listing pages. The job listing pages will then have canonical tags pointing to the category page as the primary URL to be indexed. Another opinion came from a third party that this can be seen as if we are tricking Google and would get penalised, **Is that even true? **Why would Google penalise for this if thats their recommendations in the first place? This third party suggested using nofollow on the links to these listings, or even not not index them all together. What are your thoughts? Thanks Issa
Intermediate & Advanced SEO | | iQi0 -
Switching from HTTP to HTTPS: 301 redirect or keep both & rel canonical?
Hey Mozzers, I'll be moving several sites from HTTP to HTTPS in the coming weeks (same brand, multiple ccTLDs). We'll start on a low traffic site and test it for 2-4 weeks to see the impact before rolling out across all 8 sites. Ideally, I'd like to simply 301 redirect the HTTP version page to the HTTPS version of the page (to get that potential SEO rankings boost). However, I'm concerned about the potential drop in rankings, links and traffic. I'm thinking of alternative ways and so instead of the 301 redirect approach, I would keep both sites live and accessible, and then add rel canonical on the HTTPS pages to point towards HTTP so that Google keeps the current pages/ links/ indexed as they are today (in this case, HTTPS is more UX than for SEO). Has anyone tried the rel canonical approach, and if so, what were the results? Do you recommend it? Also, for those who have implemented HTTPS, how long did it take for Google to index those pages over the older HTTP pages?
Intermediate & Advanced SEO | | Steven_Macdonald0 -
Partial duplicate content and canonical tags
Hi - I am rebuilding a consumer website, and each product page will contain a unique product image, and a sentence or two about the product (and we tend to use a lot of the same words in different ways across products). I'd like to have a tabbed area below the product info that talks about the overall product line, and this content would be duplicate across all the product pages (a "Why use our products" type of thing). I'd have this duplicate content also living on its own URL's so they can be found alone in the SERP's. Question is, do I need to add the canonical tag to this page, since there's partial duplicate content on the product pages? And if I did that, would my product pages go un-indexed?? I understand how to handle completely duplicated content, it's the partial duplicate that I'm having difficulty figuring out.
Intermediate & Advanced SEO | | Jenny10 -
Is this structure valid for a canonical tag?
Working on a site, and noticed their canonical tags follow the structure: //www.domain.com/article They cited their reason for this as http://www.ietf.org/rfc/rfc3986.txt. Does anyone know if Google will recognize this as a valid canonical? Are there any issues with using this as a the canonical?
Intermediate & Advanced SEO | | nicole.healthline0 -
SEO Penalties for Splitting Page for Two Store Locations
Hello fellow SEO'ers! I have a question regarding the overall SEO implications of using a single page to describe the services/products offered at two different locations. The locations are in two different states/cities. I have tried to explain to the client that I working with that this is essentially splitting the page in two from a search ranking perspective. I have a feeling that Google sees this page as partially dedicated to one city, and partly to another... meaning that it won't rank as well as it could for either city. Is my thinking correct? Seems logical. The client has done this site-wide for every service/product that they offer in their facilities. I'm offering some title/description recommendations for the entire site right now, and I'm going back and forth with myself whether to include the city names in the titles and descriptions at all. Let me know what you smart folks think. I appreciate it. Sam
Intermediate & Advanced SEO | | theBREWROOM0 -
No equivalent page to re-direct to for highly trafficked pages, what should we do?
We have several old pages on our site that we want to get rid of, but we don't want to 404 them since they have decent traffic numbers. Would it be fine to set up a 301 re-direct from all of these pages to our home page? I know the best option is to find an equivalent page to re-direct to, but there isn't a great equivalent.
Intermediate & Advanced SEO | | nicole.healthline0 -
How permanent is a rel="canonical"?
We are rolling out our canonicals now, and we were wondering: what happens if we decide we did this wrong and need to change where canonicals point? In other words, how bad of a thing is it to have a canonical tag point to page a for a while, then change it to point to page b? I'm just curious to see how permanent of a decision we are making, and how bad it will be if we screwed up and need to change later. Thanks!
Intermediate & Advanced SEO | | CoreyTisdale0