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
-
Do cross domain rel canonical and original source tags have to be the same?
I have placed content on a partner site using the same content that is on my site. I want the link juice from the site and the canonical tag points back to my site. However, they are also using the original source tag as they publish a lot of news. If they have the original source tag as the page on their site and the canonical as mine, is this killing the link juice from the canonical and putting me in jeopardy of a duplicate content penalty? Google has already started indexing the page on their site with the same content.
Intermediate & Advanced SEO | | SecuritiesCE0 -
Best Practice Approaches to Canonicals vs. Indexing in Google Sitemap vs. No Follow Tags
Hi There, I am working on the following website: https://wave.com.au/ I have become aware that there are different pages that are competing for the same keywords. For example, I just started to update a core, category page - Anaesthetics (https://wave.com.au/job-specialties/anaesthetics/) to focus mainly around the keywords ‘Anaesthetist Jobs’. But I have recognized that there are ongoing landing pages that contain pretty similar content: https://wave.com.au/anaesthetists/ https://wave.com.au/asa/ We want to direct organic traffic to our core pages e.g. (https://wave.com.au/job-specialties/anaesthetics/). This then leads me to have to deal with the duplicate pages with either a canonical link (content manageable) or maybe alternatively adding a no-follow tag or updating the robots.txt. Our resident developer also suggested that it might be good to use Google Index in the sitemap to tell Google that these are of less value? What is the best approach? Should I add a canonical link to the landing pages pointing it to the category page? Or alternatively, should I use the Google Index? Or even another approach? Any advice would be greatly appreciated. Thanks!
Intermediate & Advanced SEO | | Wavelength_International0 -
How does a page with a canonical for another domain impact SEO?
Hi, We have a requirement to host files that contains .html, .css, .js, and .pdf files externally on AWS S3 bucket. We have a landing page on our site that contains a link to those external links (i.e. pdf). On our site's (hosted on Drupal), landing page we already have a canonical link for the current landing page. On the .html file which is hosted externally, we were thinking to add the same canonical link that exists for the landing page so that search engines will go to the externally available .html file and interpret that the externally hosted file is related to our landing page. I was wondering if this is an acceptable solution without any SEO penalty. If there is a penalty, what would be the alternative solution to this so we can host files externally and drive most of the traffic to our landing page? Example Landing page: absolute url = https://www.site-domain.com/page-url ...... Externally available .html file (static) ......
Intermediate & Advanced SEO | | KendallHershey0 -
Best Way to Incorporate FAQs into Every Page - Duplicate Content?
Hi Mozzers, We want to incorporate a 'Dictionary' of terms onto quite a few pages on our site, similar to an FAQ system. The 'Dictionary' has 285 terms in it, with about 1 sentence of content for each one (approximately 5,000 words total). The content is unique to our site and not keyword stuffed, but I am unsure what Google will think about us having all this shared content on these pages. I have a few ideas about how we can build this, but my higher-ups really want the entire dictionary on every page. Thoughts? Image of what we're thinking here - http://screencast.com/t/GkhOktwC4I Thanks!
Intermediate & Advanced SEO | | Travis-W0 -
Rel=canonical on image pages
Hi, Im working on a Wordpress hosted blog site. I recently did a "site:search" in Google for a specific article page to make sure it was getting crawled, and it returned three separate URLs in the search results. One was the article page, and the other two were the URLs that hosted the images that are found in the article. Would you suggest adding the rel=canonical tag to the pages that host the images so they point back to the actual context article page? Or are they fine being left alone? Thank you!
Intermediate & Advanced SEO | | dbfrench0 -
Can I use rel=canonical and then remove it?
Hi all! I run a ticketing site and I am considering using rel=canonical temporary. In Europe, when someone is looking for tickets for a soccer game, they look for them differently if the game is played in one city or in another city. I.e.: "liverpool arsenal tickets" - game played in the 1st leg in 2012 "arsenal liverpool tickets - game played in the 2nd leg in 2013 We have two different events, with two different unique texts but sometimes Google chooses the one in 2013 one before the closest one, especially for queries without dates or years. I don't want to remove the second game from our site - exceptionally some people can broswer our website and buy tickets with months in advance. So I am considering place a rel=canonical in the game played in 2013 poiting to the game played in a few weeks. After that, I would remove it. Would that make any sense? Thanks!
Intermediate & Advanced SEO | | jorgediaz0 -
Trailing slash and rel="canonical"
Our website is in a directory format: http://www.website.com/website.asp Our homepage display URL is http://www.website.com which currently matches our to eliminate the possibility of duplicate content. However, I noticed that in the SERPs, google displays the homepage with a trailing slash http://www.website.com/ My question: should I change the rel="canonical" to have a trailing slash? I noticed one of our competitors uses the trailing slash in their rel="canonical" Do potential benefits outweigh the risks? I can PM further information if necessary. Thanks for the assistance in advance...
Intermediate & Advanced SEO | | BethA0 -
How accurate and quick does Google pick up on canonical tags?
Hey Peeps! I was just wondering what your experiences are in how fast Google will pick up on canonical tags and how often they use the 'strong hint' in stead of leaving it be? I'm based in The Netherlands and for websites with a decent amount of content and links (where Google indexes new content quickly) they pick up on it within 1-2 weeks. So far they've ignored some canonical tags on one of my websites. Perhaps that's because they don't agree with the degree in which the pages are similar. Thanks in advance!
Intermediate & Advanced SEO | | StevenvanVessum0