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
-
Htaccess - Redirecting TAG or Category pages
Hello Fellow Moz's, We have an issue redirecting some /TAG and /Category pages to inner pages. As an example we use: RedirectMatch 301 /category/Sample-Category(.*) https://OurDomain.com.au/New-Page//$1 That works well. The issue is we have other categories and tags that are named similar to /Sample-Category As an example, if we try to redirect /Sample-Category-1 to /New-Page-1 - it will not work, and redirects to /New-Page I assume this is because /Sample-Category is already being redirected, so anything after /Sample-Category like -1 or -2 or -3 etc, will not be recognized. Anyone know of a workaround?
Intermediate & Advanced SEO | | Jes-Extender-Australia0 -
Pages with similar content: Redirect or Canonical? Or something else?
We have two pages on our site with similar content. One was originally a landing page for a marketing campaign, somewhat of a micro-site feel with a lot of content. We recently optimized another page on the site with much of the same content from the original landing page/micro-site. In order to avoid duplicate content, and to let Google know our authority page is the new page, we're wondering what is best practice: Should we... 301 redirect the old page? No index the old page? Keep both pages and use a canonical to tell Google the new page is authority? Or something else?
Intermediate & Advanced SEO | | seo_1234b0 -
Does Google View "SRC", "HREF", TITLE and Alt tags as Duplicate Content on Home Page Slider?
Greetings MOZ Community. A keyword matrix was developed by my SEO firm. I am in the process of integrating primary, secondary and terciary phrases into the text and am also sprinkling three or four other terms. Using a keyword density tool (http://www.webconfs.com/keyword-density-checker.php) the results were somewhat unexpected after I optimized. So I then looked at the source code and noticed text from HREF, ALT and SRC tags that may be effecting how Google would interpret text on the page. Our home page (www.nyc-officespace-leader.com) contains a slider with commercial real estate listings. Would Google index the SRC, HREF, TITLE and ALT tags in these slider items? Would this be detrimental to SEO? The code for one listing (and there are 7-8 in the slider) looks like this: | href="http://www.nyc-officespace-leader.com/listings/305-fifth-avenue-office-suite-1340sf" title="Lease a Prestigious Fifth Avenue Office - Manhattan, New York">Class A Fifth Avenue Offices class="blockLeft"><a< p=""></a<> href="http://www.nyc-officespace-leader.com/listings/305-fifth-avenue-office-suite-1340sf" title="Lease a Prestigious Fifth Avenue Office - Manhattan, New York"> src="http://dr0nu3l9a17ym.cloudfront.net/wp-content/uploads/fsrep/houses/125x100/305.jpg" alt="Lease a Prestigious Fifth Avenue Office - Manhattan, New York" width="125" height="94" /> 1,340 Sq. Ft. $5,918 / month Fifth Avenue Midtown / Grand Central <a< p=""></a<> | Could the repetition of the title text ("lease a Prestigious Fifth...") trigger a duplicate content penalty? Should the slider content be blocked or set to no-index by some kind of a Java script? We have worked very hard to optimize the home page so it would be a real shame if through some technical oversight we got hit by a Google Panda penalty. Thanks, Alan Thanks
Intermediate & Advanced SEO | | Kingalan10 -
Should we show(to google) different city pages on our website which look like home page as one page or different? If yes then how?
On our website, we show events from different cities. We have made different URL's for each city like www.townscript.com/mumbai, www.townscript.com/delhi. But the page of all the cities looks similar, only the events change on those different city pages. Even our home URL www.townscript.com, shows the visitor the city which he visited last time on our website(initially we show everyone Mumbai, visitor needs to choose his city then) For every page visit, we save the last visited page of a particular IP address and next time when he visits our website www.townscript.com, we show him that city only which he visited last time. Now, we feel as the content of home page, and city pages is similar. Should we show these pages as one page i.e. Townscript.com to Google? Can we do that by rel="canonical" ? Please help me! As I think all of these pages are competing with each other.
Intermediate & Advanced SEO | | sanchitmalik0 -
Merging blog post tags within static page - Rel = Canonical?
As a blogger, I use a combination of categories and tags in order to organize my content. I do index tags because they've been very powerful for SEO purposes, but there are certain keywords in which I'd like to be able to create an entirely separate static page with the tagged posts merged onto it. So in other words, this is what I'd like the landing page to be: www.website.com/keyword as opposed to www.website.com/tags/keyword Because of this, I'm uncertain what I need to do with that tag page. With this, I would assume that www.website.com/tags/keywords needs to be indexed, but what would be the wise thing to do? Do I place a rel=canonical on www.website.com/tags/keyword to the static page? Do I do a simple re-direct? Do I just leave it indexed? Will it dilute my desired landing page? Would appreciate all comments and thoughts. Thank you!
Intermediate & Advanced SEO | | longview0 -
Is the Penguin algorithmic penalty on a page basis or a site basis?
Just wondering if there has been any clarification of whether the Penguin algorithmic penalty is on a Page basis or a Site basis? In other words, is it all or nothing?
Intermediate & Advanced SEO | | darkgreenguy0 -
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