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 -
Is it better to keep a glossary or terms on one page or break it up into multiple pages?
We have a very large glossary of over 1000 industry terms on our site with links to reference material, embedded video, etc. Is it better for SEO purposes to keep this on one page or should we break it up into multiple pages, a different page for each letter for example? Thanks.
On-Page Optimization | | KenW0 -
Should I optimize my home-page or a sub-page for my most important keyword
Quick question: When choosing the most important keyword set that I would like to rank for, would I be better off optimizing my homepage, or a sub page for this keyword. My thinking goes as follows: The homepage (IE www.mysite.com) naturally has more backlinks and thus a better Google Page Rank. However, there are certain things I could do to a subpage (IE www.mysite.com/green-widgets-los-angeles ) that I wouldn't want to do to the homepage, which might be more "optimal" overall. Option C, I suppose, would be to optimize both the homepage, and a single sub-page, which is seeming like a pretty good solution, but I have been told that having multiple pages optimized for the same keywords might "confuse" search engines. Would love any insight on this!
On-Page Optimization | | Jacob_A2 -
Can you use the canonical tag and rel=next and rel=prev on category pages.
We have a conflict of information between our web developers and our SEO company. We are an on-line retail company hence we have a fair number of different categories. Our site is set up with the rel=next and rel=prev tags. Our SEO company have asked us to implement canonical links on our category pages and leave the rel=next and rel=prev tags as they are. Our web developers are saying by doing this we are asking Google to ignore all of our products on all of the pages except page 1 which would mean Google would not index a lot of our products. I have looked at a few articles but I am struggling to understand which way to go. Any advice would be appreciated. Thank you in advance.
On-Page Optimization | | Palmbourne0 -
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 -
What is on page links?
Hi - i would like to know exactly what an on page link is? i understand the linking system however cant work what exactly what an on page link is? Thanks
On-Page Optimization | | OasisLandDevelopment0 -
Hey guys! I was looking at adding the H1 tag lower on the page than the H2 tag because I want the top bit to be a call to action. Is this proper practice?
Hey guys! I was looking at adding the H1 tag lower on the page than the H2 tag because I want the top bit to be a call to action. Is this proper practice?
On-Page Optimization | | Web3Marketing870 -
Best practice for Meta-Robots tag in categories and author pages?
For some of our site we use Wordpress, which we really like working with. The question I have is for the categories and authors pages (and similiar pages), i.e. the one looking: http://www.domain.com/authors/. Should you or should you not use follow, noindex for meta-robots? We have a lot of categories/tags/authors which generates a lot of pages. I'm a bit worried that google won't like this and leaning towards adding the follow, noindex. But the more I read about it, the more I see people disagree. What does the community of Seomoz think?
On-Page Optimization | | Lobtec0