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
-
Shifting target keyword to a new page, how do we rank the internal page?
I have been targeting one keyword for home page that was ranking between the postilion 6-7 but was never ranking on 1st as there were 2 highly competitive keywords targeted on the same page, I changed the keyword to an internal service page to rank it on 1st, I have optimized the content as well but the home page is still ranking on 11th, how do I get the internal page rank on that keyword
On-Page Optimization | | GOMO-Gabriel0 -
Colons in title tag?
Does Google view the colon as a keyword separator like it does with the pipe (|) character? Currently, our site automatically constructs the title tag based on the page name given by the user. Long ago, we started using the colon character to visually separate the brand & model of the product from the size, and as a result, all of our title tags have been constructed this way. This was done more to make it easier to read for humans than for search engines. My question is - should I consider getting rid of the colon from our title tags? To give more info, our website sells tires. So, for any given model of tire, there might be 25-100 different individual sizes. The tags are constructed as follows: (brand)(model) : (size). Here's an example from our site: GENERAL ALTIMAX ARCTIC : 225/45R17 91Q The brand is General Tire, the model is the Altimax Arctic and the size is 225/45R17 91Q Since this entire string really constitutes the full product name, should I remove the colon so that Google views it that way? Or, since I have used a colon instead of a pipe, will Google simply ignore it and treat the entire string as one keyword phrase?
On-Page Optimization | | kcourtem0 -
Can I use Same Keyword for Multi pages Title Tags?
Hello All, I am working on client website and currently they are targeting One Keywords for multi pages. As I have search with Allintitle: Search query and Google display around 37 pages of website which carry same keyword in "Title Tags". I have told to client to change the "Title Tags" but they want that keyword for all relevant pages. So I want to know is that harm in Search Engine Ranking? Note: They have not done the link building activities for multi pages with same Keyword, they are using only in "Title Tags" only
On-Page Optimization | | jemindesai0 -
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 -
Do alt tags count towards on page keyword density?
Hello...I have written a bunch of content for my site using a useful tool called Scribe SEO which recommends keyword density at 5% if I remember correctly. So all my my newly written content is below this level but I am left wondering if by adding alt tags with my chosen keywords I will be considered to be over the limit and cause a red flag? Can anyone clarify this for me please?
On-Page Optimization | | Wallander0 -
301 redirects from several sub-pages to one sub-page
Hi! I have 14 sub-pages i deleted earlier today. But ofcourse Google can still find them, and gives everyone that gives them a go a 404 error. I have come to the understading that this wil hurt the rest of my site, at least as long as Google have them indexed. These sub-pages lies in 3 different folders, and i want to redirect them to a sub-page in a folder number 4. I have already an htaccess file, but i just simply cant get it to work! It is the same file as i use for redirecting trafic from mydomain.no to www.mydomain.no, and i have tried every kind of variation i can think of with the sub-pages. Has anyone perhaps had the same problem before, or for any other reason has the solution, and can help me with how to compose the htaccess file? 🙂 You have to excuse me if i'm using the wrong terms, missing something i should have seen under water while wearing a blindfold, or i am misspelling anything. I am neither very experienced with anything surrounding seo or anything else that has with internet to do, nor am i from an englishspeaking country. Hope someone here can light up my path 🙂 Thats at least something you can say in norwegian...
On-Page Optimization | | MarieA1 -
Rel="canonical" on home page?
I'm using wordpress and the all in one seo pack with the canonical option checked. As I understand it the rel="canonical" tag should be added to pages that are duplicate or similar to tell google that another page (one without the rel="canonical" tag) is the correct one as the url in the tag is pointing google towards it. Why then does the all in one seo pack add rel="canonical" to every page on my site including the home page? Isn't that confusing for google?
On-Page Optimization | | SamCUK0 -
How to handle Meta Tags on Pagination... page 2,3,4....
Seems that SEOMoz reports are considering my paginated pages as duplicate Meta Tags. For example, I have a product catalog with 5 paginated pages. Obviously the content on each page is unique and the URL ends in =4, =5 for the page number, but the Title and Description are the same for all the pages. Any suggestions on how to handle this? The pages other than page 1 are not indexed, so it should not be a big deal. But wondering if I should programatically ad the page number to the additional pages to show a difference?
On-Page Optimization | | paddlej0