Rel=Canonical
-
Any downsides to adding the rel=canonical tag to the canonical page itself? It will make it easier for us to implement based on the way our site's templates work.
For example, we would add to the page http://www.mysite.com/original-page.aspx
The canonical tag would also appear on other dupe pages like:
http://www.mysite.com/original-page.aspx?ref=93929299
http://www.mysite.com/original-page.aspx?ref=view29199292
etc
-
I haven't seen any evidence that it's a problem, but John's point is correct - Bing does officially say not to do it. Actually, Google originally said this, too, but then eased off (if I recall correctly). It's gotten so common that I don't think either engine can really penalize it, honestly. I do it all the time.
-
Google is definatly OK with this, Bing aparently might have issues, but the only way around that would be implimenting it for all the dupe pages but not the original (which is less trivial to detect, or impossable, and why google allows it)
Due to the nature of the objection (Bing claims your telling it that the page is a duplicate of itself, see the article John linked), I would actualy expect Bing to change that in the future to something more sensable if true.
Overall, I would impliment it on every page just to prevent all those links to it with random tracking paramiters e.t.c. that people could throw on.
-
IMO that's completely fine. You are passing a directive to Google telling them that whatever versions of that one URL they may come across, the correct URL for them to index, crawl and display in their SERPS is the "original-url". So you are good.
-
Google doesn't care, but Bing may not like this. Read http://nickroshon.com/seo/google-bing-disagree-on-relcanonical-implementation for more info.
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
-
Does Google read dynamic canonical tags?
Does Google recognize rel=canonical tag if loaded dynamically via javascript? Here's what we're using to load: <script> //Inject canonical link into page head if (window.location.href.indexOf("/subdirname1") != -1) { canonicalLink = window.location.href.replace("/kapiolani", ""); } if (window.location.href.indexOf("/subdirname2") != -1) { canonicalLink = window.location.href.replace("/straub", ""); } if (window.location.href.indexOf("/subdirname3") != -1) { canonicalLink = window.location.href.replace("/pali-momi", ""); } if (window.location.href.indexOf("/subdirname4") != -1) { canonicalLink = window.location.href.replace("/wilcox", ""); } if (canonicalLink != window.location.href) { var link = document.createElement('link'); link.rel = 'canonical'; link.href = canonicalLink; document.head.appendChild(link); } script>
Technical SEO | | SoulSurfer80 -
How google bot see's two the same rel canonicals?
Hi, I have a website where all the original URL's have a rel canonical back to themselves. This is kinda like a fail safe mode. It is because if a parameter occurs, then the URL with the parameter will have a canonical back to the original URL. For example this url: https://www.example.com/something/page/1/ has this canonical: https://www.example.com/something/page/1/ which is the same since it's an original URL This url https://www.example.com/something/page/1/?parameter has this canonical https://www.example.com/something/page/1/ like i said before, parameters have a rel canonical back to their original url's. SO: https://www.example.com/something/page/1/?parameter and this https://www.example.com/something/page/1/ both have the same canonical which is this https://www.example.com/something/page/1/ Im telling you all that because when roger bot tried to crawl my website, it gave back duplicates. This happened because it was reading the canonical (https://www.example.com/something/page/1/) of the original url (https://www.example.com/something/page/1/) and the canonical (https://www.example.com/something/page/1/) of the url with the parameter (https://www.example.com/something/page/1/?parameter) and saw that both were point to the same canonical (https://www.example.com/something/page/1/)... So, i would like to know if google bot treats canonicals the same way. Because if it does then im full of duplicates 😄 thanks.
Technical SEO | | dos06590 -
Should summary pages have the rel canonical set to the full article?
My site has tons of summary pages, Whether for a PDF download, a landing page or for an article. There is a summary page, that explains the asset and contains a link to the actual asset. My question is that if the summary page is just summary of an article with a "click here to read full article" button, Should I set the rel canonical on the summary page to go to the full article? Thanks,
Technical SEO | | Autoboof0 -
Should I use canonicals? Best practice?
Hi there, I've been working on a pretty dated site. The product pages have tabs that separate the product information, e.g., a tab for specifications, a tab for system essentials, an overview tab that is actually just a copy of the product page. Each tab is actually a link to a completely separate page, so product/main-page is split into product/main-page/specs, product/main-page/resources, etc. Wondering if canonicals would be appropriate in this situation? The information isn't necessarily duplicate (except for the overview tabs) but with each tab as a separate page, I would imagine that's diluting the value of the main page? The information all belongs to the main page, shouldn't it be saying "I'm a version of the main page"?
Technical SEO | | anneoaks0 -
Using Rel Nofollow on Duplicate Pages
Hi there, I have a rather large site that has duplicate content on many pages due to how it's being spidered by google. I was hoping I could set the internal link to this page as "nofollow." My question is that I have hundreds of other sites with backlinks to these duplicate content pages.. will this affect me negatively if I tell google not to index the duplicated pages?
Technical SEO | | trialminecraftserverfinder0 -
Rel Canonical ? please help
Can some one please answer a question for me, I have a crawl error stating that I have [#### Rel Canonical 326](http://pro.seomoz.org/campaigns/243472/issues/18) Can you please advise me on how serious these Errors are? I was told by one person not to worry but It seems far to many to me. thanks
Technical SEO | | Chris__Chris0 -
Rel=Canonical Header Location
Hello, I've been trying to get our rel=canonical issues sorted out. A fellow named Ayaz very kindly pointed out that I'm trying to put the code into the wysisyg editor, but this might not be the best place to put the code. We are using Drupal 6. Where do I insert the code? head> <link rel="canonical" href="http://www.example.com/blog/my-awesome-blog-post"> Thanks!
Technical SEO | | OTSEO0 -
Canonical for stupid _GET parameters or not? [deep technical details]
Hi, Im currently working on www.kupwakacje.pl which is something like travel agency. People can search for holidays and buy/reserve them. I do know plenty of problems on my website, and thx to seomoz hopefully I will be able to fix them but one is crucial and it's kind of hard to fix I think. The search engine is provided by external party in form of simple API which is in the end responding with formatted HTML - which is completly stupid and pointless, but that's not the main problem. Let's dive in: So for example the visitor goes to homepage, selects Egypt and hit search button. He will be redirected to www.kupwakacje.pl/wczasy-egipt/?ep3[]=%3Fsp%3D3%26a%3D2%26kt%3D%26sd%3D10.06.2011%26drt%3D30%26drf%3D0%26px and this is not a joke 😉 'wczasy-egipt' is my invention obviously and it means 'holidays-egypt'. I've tried to at least have 'something' in the url that makes google think it's related to Egypt indeed. Rest which is the complicated ep3[] thingy is a bunch of encoded parameters. This thing renders in first step a list of hotels, in next one hotel specific offer and in next one the reservation page. Problem is that all those links generated by this so-called API are only changing subparameters in ep3[] parameter so for example clicking on a single hotel changes to url to: www.kupwakacje.p/wczasy-egipt/?url=wczasy-egipt/&ep3[]=%3Fsid%3Db5onrj4hdnspb5eku4s2iqm1g3lomq91%26l ang%3Dpl%26drt%3D30%26sd%3D10.06.2011%26ed%3D30.12.1999%26px%3D99999 %26dsr%3D11%253A%26ds%3D11%253A%26sp%3D which is obviously looking not very different to the first one. what I would like to know is shall i make all pages starting with 'wczasy-egipt' a rel-canonical to the first one (www.kupwakacje.pl/wczasy-egipt) or shoudn't I? google recognizes the webpage according to webmasters central, and recognizes the url but responses with mass duplicate content. What about positioning my website for the hotel names - so long tail optimalization? I know it's a long and complicated post, thx for reading and I would be very happy with any tip or response.
Technical SEO | | macic0