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.
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
-
Should I apply Canonical Links from my Landing Pages to Core Website Pages?
I am working on an SEO project for the website: https://wave.com.au/ There are some core website pages, which we want to target for organic traffic, like this one: https://wave.com.au/doctors/medical-specialties/anaesthetist-jobs/ Then we have basically have another version that is set up as a landing page and used for CPC campaigns. https://wave.com.au/anaesthetists/ Essentially, my question is should I apply canonical links from the landing page versions to the core website pages (especially if I know they are only utilising them for CPC campaigns) so as to push link equity/juice across? Here is the GA data from January 1 - April 30, 2019 (Behavior > Site Content > All Pages😞
Intermediate & Advanced SEO | | Wavelength_International0 -
Best Practices for Title Tags for Product Listing Page
My industry is commercial real estate in New York City. Our site has 300 real estate listings. The format we have been using for Title Tags are below. This probably disastrous from an SEO perspective. Using number is a total waste space. A few questions:
Intermediate & Advanced SEO | | Kingalan1
-Should we set listing not no index if they are not content rich?
-If we do choose to index them, should we avoid titles listing Square Footage and dollar amounts?
-Since local SEO is critical, should the titles always list New York, NY or Manhattan, NY?
-I have red that titles should contain some form of branding. But our company name is Metro Manhattan Office Space. That would take up way too much space. Even "Metro Manhattan" is long. DO we need to use the title tag for branding or can we just focus on a brief description of page content incorporating one important phrase? Our site is: w w w . m e t r o - m a n h a t t a n . c o m <colgroup><col width="405"></colgroup>
| Turnkey Flatiron Tech Space | 2,850 SF $10,687/month | <colgroup><col width="405"></colgroup>
| Gallery, Office Rental | Midtown, W. 57 St | 4441SF $24055/month | <colgroup><col width="405"></colgroup>
| Open Plan Loft |Flatiron, Chelsea | 2414SF $12,874/month | <colgroup><col width="405"></colgroup>
| Tribeca Corner Loft | Varick Street | 2267SF $11,712/month | <colgroup><col width="405"></colgroup>
| 275 Madison, LAW, P7, 3,252SF, $65 - Manhattan, New York |0 -
Can noindexed pages accrue page authority?
My company's site has a large set of pages (tens of thousands) that have very thin or no content. They typically target a single low-competition keyword (and typically rank very well), but the pages have a very high bounce rate and are definitely hurting our domain's overall rankings via Panda (quality ranking). I'm planning on recommending we noindexed these pages temporarily, and reindex each page as resources are able to fill in content. My question is whether an individual page will be able to accrue any page authority for that target term while noindexed. We DO want to rank for all those terms, just not until we have the content to back it up. However, we're in a pretty competitive space up against domains that have been around a lot longer and have higher domain authorities. Like I said, these pages rank well right now, even with thin content. The worry is if we noindex them while we slowly build out content, will our competitors get the edge on those terms (with their subpar but continually available content)? Do you think Google will give us any credit for having had the page all along, just not always indexed?
Intermediate & Advanced SEO | | THandorf0 -
Why is rel="canonical" pointing at a URL with parameters bad?
Context Our website has a large number of crawl issues stemming from duplicate page content (source: Moz). According to an SEO firm which recently audited our website, some amount of these crawl issues are due to URL parameter usage. They have recommended that we "make sure every page has a Rel Canonical tag that points to the non-parameter version of that URL…parameters should never appear in Canonical tags." Here's an example URL where we have parameters in our canonical tag... http://www.chasing-fireflies.com/costumes-dress-up/womens-costumes/ rel="canonical" href="http://www.chasing-fireflies.com/costumes-dress-up/womens-costumes/?pageSize=0&pageSizeBottom=0" /> Our website runs on IBM WebSphere v 7. Questions Why it is important that the rel canonical tag points to a non-parameter URL? What is the extent of the negative impact from having rel canonicals pointing to URLs including parameters? Any advice for correcting this? Thanks for any help!
Intermediate & Advanced SEO | | Solid_Gold1 -
Using Canonical URL to poin to an external page
I was wondering if I can use a canonical URL that points to a page residing on external site? So a page like:
Intermediate & Advanced SEO | | llamb
www.site1.com/whatever.html will have a canonical link in its header to www.site2.com/whatever.html. Thanks.0 -
Canonical tag + HREFLANG vs NOINDEX: Redundant?
Hi, We launched our new site back in Sept 2013 and to control indexation and traffic, etc we only allowed the search engines to index single dimension pages such as just category, brand or collection but never both like category + brand, brand + collection or collection + catergory We are now opening indexing to double faceted page like category + brand and the new tag structure would be: For any other facet we're including a "noindex, follow" meta tag. 1. My question is if we're including a "noindex, follow" tag to select pages do we need to include a canonical or hreflang tag afterall? Should we include it either way for when we want to remove the "noindex"? 2. Is the x-default redundant? Thanks for any input. Cheers WMCA
Intermediate & Advanced SEO | | WMCA0 -
Lowercase VS. Uppercase Canonical tags?
Hi MOZ, I was hoping that someone could help shed some light on an issue I'm having with URL structure and the canonical tag. The company I work for is a distributor of electrical products and our E-commerce site is structured so that our URL's (specifically, our product detail page URL's) include a portion (the part #) that is all uppercase (e.g: buy/OEL-Worldwide-Industries/AFW-PG-10-10). The issue is that we have just recently included a canonical tag in all of our product detail pages and the programmer that worked on this project has every canonical tag in lowercase instead of uppercase. Now, in GWT, I'm seeing over 20,000-25,000 "duplicate title tags" or "duplicate descriptions". Is this an issue? Could this issue be resolved by simply changing the canonical tag to reflect the uppercase URL's? I'm not too well versed in canonical tags and would love a little insight. Thanks!
Intermediate & Advanced SEO | | GalcoIndustrial0 -
Best way to implement canonical tags on an ecommerce site with many filter options?
What would be the best way to add canonical tags to an ecommerce site with many filter options, for example, http://teacherexpress.scholastic.com? Should I include a canonical tag for all filter options under a category even though the pages don't have the same content? Thanks for reading!
Intermediate & Advanced SEO | | DA20130