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.
Rel canonical tag back to the same page the tag is on?
-
Very simple,
Why would a website (and I have seen tons doing this) link the rel canonical tag back to the same page the tag is on?
Example: somepage.htm has a canonical tag linking to somepage.htm
I thought the idea of this tag was to tell google if 2 pages are similar, this page is the original, and it's this page which should be indexed and the page with the tag on should pass all PR to the original.
Maybe im wrong and someone can help me out to understand this.
-
For all practical purposes, Google doesn't seem to index pages where it recognizes the canonical as legitimate. You won't find them in a "site:" query, "cache:" command, etc. Google may call that a "filter", but once it's reached that point, the URL is as good as de-indexed. There may be subtle, technical distinctions, but the end result is virtually the same.
-
Not quite. Canonical (per Matt Cutts) is considered a hint as to what the real page is. It doesn't stop the duplicate page from being crawled or indexed (a page that isn't indexed will not show up anywhere in Google for any query), it prevents the duplicate page from winning the duplicate race (i.e. if you don't pick a winner, Google will pick one for you).
-
Thanks Tom (and everyone else for the replies),
So if someone linked to a page with a querystring Google wouldn't index that page because the canonical tag is pointing to a url which doesn't have that query in?
I like the scraped part as well, that in itself makes it worth while.
-
Newegg.com uses this because they have affiliates, searches and numerous other things that affect their query strings.
Remember that ANY change to the query string is seen as a new page. So
domain.com?page=a&link=1
domain.com?page=a&link=2are considered separate pages, even if they return the same content.
Canonical is used to determine which duplicate page "wins" the index race. All other versions are considered duplicate and, thus, devalued.
-
There's a couple of reasons why people might want to do this (and why I do with all my websites)
First of all, the page/site might be scraped and replicated by a bot, particularly if it's an authority domain. Having your canonicals in place to begin with will help reduce the chance of your content being seen as duplicate, should a bot scrape your site.
Another reason would be if a website might generate any additional versions of the page through queries, eg www.domain.com/page.php?query2 - Having a self referring canonical will also tell Google that you want to rank the URL without any other queries, which can help prevent any of those queries appearing in the Google index and/or SERPs.
-
Hi,
I am not an expert, so please do not take my answer very seriously. What you mention, of making a canonical tag pointing to the same URL, looks fine. In my understanding, canonical tags were created to tell the search engines that a page is the right one, even if the system you are using creates address that could look like duplicate content. For example, if you are using a Content Management System like wordpress or Joomla, you could have the following:
-
http://domain.com/date/month/page1 and so on.
Search engines (again, I am not sure, I am just a newbee), could think all this pages are duplicate content, and could penalize you for this. But if you indicate with the canonical tag that the right url is http://domain.com/page1, then you are safe.
I hope somebody with more experience could help you better,
Best Regards,
Daniel
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
-
Ranking dropped after change single page url, should I change it back?
I was making updates to the content on the following page, and a few days later dropped from #2 SERP ranking to 50+. Things I checked: Yes, 301 redirect was implemented right away. After publishing, I manually requested indexing in search console. Right after publishing I re-submitted the sitemap manually and Google said they had not crawled it in 9 days. My question: should I change the URL back to the old one, or give it a little more time (especially since I re-submitted sitemap) Original URL: https://www.travelinsurancereview.net/plans/travel-medical/ New URL: https://www.travelinsurancereview.net/plans/travel-medical-insurance/
On-Page Optimization | | DamianTysdal0 -
FAQ page structure
I have read in other discussions that having all questions on an FAQ page is the way to go and then if the question has an answer worthy of its own page, you should abbreviate the answer and link to the page with more content. My question is when using some templates in WP, they have a little + button you can click and it reveal the answer to the question. Does this hurt SEO versus having all text visible and then using headers/subheaders? An example of the + button https://fyrfyret.dk/faq/
On-Page Optimization | | OrlandSEO1 -
Will it upset Google if I aggregate product page reviews up into a product category page?
We have reviews on our product pages and we are considering averaging those reviews out and putting them on specific category pages in order for the average product ratings to be displayed in search results. Each averaged category review would be only for the products within it's category, and all reviews are from users of the site, no 3rd party reviews. For example, averaging the reviews from all of our boxes products pages, and listing that average review on the boxes category page. My question is, will this be doing anything wrong in the eyes of Google, and if so how so? -Derick
On-Page Optimization | | Deluxe0 -
Why are http and https pages showing different domain/page authorities?
My website www.aquatell.com was recently moved to the Shopify platform. We chose to use the http domain, because we didn't want to change too much, too quickly by moving to https. Only our shopping cart is using https protocol. We noticed however, that https versions of our non-cart pages were being indexed, so we created canonical tags to point the https version of a page to the http version. What's got me puzzled though, is when I use open site explorer to look at domain/page authority values, I get different scores for the http vs. https version. And the https version is always better. Example: http://www.aquatell.com DA = 21 and https://www.aquatell.com DA = 27. Can somebody please help me make sense of this? Thanks,
On-Page Optimization | | Aquatell1 -
Canonical tags in the body?
Hi there, Does anyone know if placing canonical tags in the body instead of the header of a page will still "take"? The system we are on means that making an editable header is no easy business and I was just wondering how big of a difference it makes to have it in a different area. Thank you in advance.
On-Page Optimization | | Whittie0 -
Should we add our company's name in page title tag or not?
We have been adding our company (Townscript) name in all the page titles. For example, in an event page of Lucknow Conclave: www.townscript.com/lucknowconclave the page title is Lucknow Conclave | Alexis Society | Townscript I read somewhere that it's not necessary to put your company's name in the title tag. Is it right? Please help!
On-Page Optimization | | sanchitmalik0 -
Does Rel=canonical affect google shopping feed?
I have a client who gets a good portion of their sales (~40%) from Google Product Feeds, and for those they want each (Product X Quantity) to have it’s own SKU, as they often get 3 listings in a given Google shopping query, i.e. 2,4,8 units of a given product. However, we are worried about this creating duplicate content on the search side. Do you know if we could rel=canonical on the site without messing with their google shopping results? The crux of the issue is that they want the products to appear distinct for the product feed, and unified for the web so as not to dilute. Thoughts?
On-Page Optimization | | VISISEEKINC0 -
Home page or landing page?
Hello, I want to ask a question related to that - Should we put keywords in the home page title if we wish to position another landing page better for particular keywords? I have read in one website about SEO that it's good the main keywords of your website to be positioned in homepage title also. f.e. Let's say we have website about web-design and our company is named Company Ltd. The title of the home page is "Company Ltd. - Web design, SEO, etc" We have also another inner page named "Web design | Company Ltd.". So should we leave the first page name only "Company Ltd." and the landing page's name "Web design | Company Ltd." . I don't know if they both have the same keyword in their title they won't compete with each other.
On-Page Optimization | | HrishikeshKarov0