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.
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!
-
Thanks for the response, Eric.
My research suggested the same plan of attack: 1) fixing the canonical tags and 2) Google Search Console URL Parameters. It's helpful to get your confirmation.
My best guess is that the parameters you've cited above are not needed for every URL. I agree that this looks like something WebSphere Commerce probably controls. I'm a few organizational layers removed from whoever set this up for us. I'll try to track down where we can control that.
-
Thanks Peter!
-
Peter has a great answer with some good resources referenced, and i'll try to add on a little bit:
1. Why it is important that the rel canonical tag points to a non-parameter URL?
It's important to use clean URLs so search engines can understand the site structure (like Peter mentioned), which will help reduce the potential for index bloat and ranking issues. The more pages out there containing the same content (ie duplicate content), the harder it will be for search engines to determine which is the best page to show in search results. While there is no "duplicate content penalty" there could be a self inflicted wound by providing too many similar options. The canonical tag is supposed to be a level of control for you to tell Google which page is the most appropriate version. In this case it should be the clean URL since that will be where you want people to start. Users can customize from there using faceted navigation or custom options.
2. What is the extent of the negative impact from having rel canonicals pointing to URLs including parameters?
Basically duplicate content and indexing issues. Both of those things you really want to avoid when running an eComm shop since that will make your pages compete with each other for ranking. That could cost ranking, visits, and revenue if implemented wrong.
3. Any advice for correcting this?
Fix the canonical tags on the site would be your first step. Next you would want to exclude those parameters in the parameter handling section of Google Search Console. That will help by telling Google to ignore URLs with the elements you add in that section. It's another step to getting clean URLs showing up in search results.
I tried getting to http://www.chasing-fireflies.com/costumes-dress-up/mens-costumes/ and realize the parameters are showing up by default like: http://www.chasing-fireflies.com/costumes-dress-up/mens-costumes/#w=*&af=cat2:costumedressup_menscostumes%20cat1:costumedressup%20pagetype:products
Are the parameters needed for every URL? Seems like this is a websphere commerce setup kind of thing.
-
Clean (w/o parameters) canonical URL helps Google to understand better your url structure and avoid several mistakes:
https://googlewebmastercentral.blogspot.bg/2013/04/5-common-mistakes-with-relcanonical.html <- mistake N:1
http://www.hmtweb.com/marketing-blog/dangerous-rel-canonical-problems/ <- mistake N:4So - your company that giving this advise is CORRECT! You should provide naked URLs everywhere when it's possible.
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
-
Rel canonical tag from shopify page to wordpress site page
We have pages on our shopify site example - https://shop.example.com/collections/cast-aluminum-plaques/products/cast-aluminum-address-plaque That we want to put a rel canonical tag on to direct to our wordpress site page - https://www.example.com/aluminum-plaques/ We have links form the wordpress page to the shop page, and over time ahve found that google has ranked the shop pages over the wp pages, which we do not want. So we want to put rel canonical tags on the shop pages to say the wp page is the authority. I hope that makes sense, and I would appreciate your feeback and best solution. Thanks! Is that possible?
Intermediate & Advanced SEO | | shabbirmoosa0 -
Can Google read content that is hidden under a "Read More" area?
For example, when a person first lands on a given page, they see a collapsed paragraph but if they want to gather more information they press the "read more" and it expands to reveal the full paragraph. Does Google crawl the full paragraph or just the shortened version? In the same vein, what if you have a text box that contains three different tabs. For example, you're selling a product that has a text box with overview, instructions & ingredients tabs all housed under the same URL. Does Google crawl all three tabs? Thanks for your insight!
Intermediate & Advanced SEO | | jlo76130 -
"Null" appearing as top keyword in "Content Keywords" under Google index in Google Search Console
Hi, "Null" is appearing as top keyword in Google search console > Google Index > Content Keywords for our site http://goo.gl/cKaQ4K . We do not use "null" as keyword on site. We are not able to find why Google is treating "null" as a keyword for our site. Is anyone facing such issue. Thanks & Regards
Intermediate & Advanced SEO | | vivekrathore0 -
Rel="self" and what to do with it?
Hey there Mozzers, Another question about a forum issue I encountered. When a forum thread has more than just one page as we all know the best course of action is to use rel="next" rel="prev" or rel="previous" But my forum automatically creates another line in the header called Rel="self" What that does is simple. If i have 3 pages http://www.example.com/article?story=abc1
Intermediate & Advanced SEO | | Angelos_Savvaidis
http://www.example.com/article?story=abc2
http://www.example.com/article?story=abc3 **instead of this ** On the first page, http://www.example.com/article?story=abc1 On the second page, http://www.example.com/article?story=abc2 On the third page, http://www.example.com/article?story=abc3: it creates this On the first page, http://www.example.com/article?story=abc1 So as you can see it creates a url by adding the ?page=1 and names it rel=self which actually gives back a duplicate page because now instead of just http://www.example.com/article?story=abc1 I also have the same page at http://www.example.com/article?story=abc1?page=1 Do i even need rel="self"? I thought that rel="next" and rel="prev" was enough? Should I change that?0 -
Dilemma about "images" folder in robots.txt
Hi, Hope you're doing well. I am sure, you guys must be aware that Google has updated their webmaster technical guidelines saying that users should allow access to their css files and java-scripts file if it's possible. Used to be that Google would render the web pages only text based. Now it claims that it can read the css and java-scripts. According to their own terms, not allowing access to the css files can result in sub-optimal rankings. "Disallowing crawling of Javascript or CSS files in your site’s robots.txt directly harms how well our algorithms render and index your content and can result in suboptimal rankings."http://googlewebmastercentral.blogspot.com/2014/10/updating-our-technical-webmaster.htmlWe have allowed access to our CSS files. and Google bot, is seeing our webapges more like a normal user would do. (tested it in GWT)Anyhow, this is my dilemma. I am sure lot of other users might be facing the same situation. Like any other e commerce companies/websites.. we have lot of images. Used to be that our css files were inside our images folder, so I have allowed access to that. Here's the robots.txt --> http://www.modbargains.com/robots.txtRight now we are blocking images folder, as it is very huge, very heavy, and some of the images are very high res. The reason we are blocking that is because we feel that Google bot might spend almost all of its time trying to crawl that "images" folder only, that it might not have enough time to crawl other important pages. Not to mention, a very heavy server load on Google's and ours. we do have good high quality original pictures. We feel that we are losing potential rankings since we are blocking images. I was thinking to allow ONLY google-image bot, access to it. But I still feel that google might spend lot of time doing that. **I was wondering if Google makes a decision saying, hey let me spend 10 minutes for google image bot, and let me spend 20 minutes for google-mobile bot etc.. or something like that.. , or does it have separate "time spending" allocations for all of it's bot types. I want to unblock the images folder, for now only the google image bot, but at the same time, I fear that it might drastically hamper indexing of our important pages, as I mentioned before, because of having tons & tons of images, and Google spending enough time already just to crawl that folder.**Any advice? recommendations? suggestions? technical guidance? Plan of action? Pretty sure I answered my own question, but I need a confirmation from an Expert, if I am right, saying that allow only Google image access to my images folder. Sincerely,Shaleen Shah
Intermediate & Advanced SEO | | Modbargains1 -
Should I NOFOLLOW my "Add To Cart" buttons?
Hello and Merry Christmass Should I NOFOLLOW my "Add To Cart" buttons? My e-commerce site has hundreds of products. Content wise, there is no real value to the reader on that page (besides for some testimonials and "why here" sentences). So it is not a page you'd want / expect to find in the SERPs. Also, with hundreds of links pointing to this page it would be "stronger" than other important pages which doesn't make sense. Last but not least, if I have limited time that the bots are on my site, why keep sending them to a non important page. This is why I am leaning to nofollowing the "add to cart" buttons and looking for reinforcements. Thanks
Intermediate & Advanced SEO | | BeytzNet0 -
Brackets vs Encoded URLs: The "Same" in Google's eyes, or dup content?
Hello, This is the first time I've asked a question here, but I would really appreciate the advice of the community - thank you, thank you! Scenario: Internal linking is pointing to two different versions of a URL, one with brackets [] and the other version with the brackets encoded as %5B%5D Version 1: http://www.site.com/test?hello**[]=all&howdy[]=all&ciao[]=all
Intermediate & Advanced SEO | | mirabile
Version 2: http://www.site.com/test?hello%5B%5D**=all&howdy**%5B%5D**=all&ciao**%5B%5D**=all Question: Will search engines view these as duplicate content? Technically there is a difference in characters, but it's only because one version encodes the brackets, and the other does not (See: http://www.w3schools.com/tags/ref_urlencode.asp) We are asking the developer to encode ALL URLs because this seems cleaner but they are telling us that Google will see zero difference. We aren't sure if this is true, since engines can get so _hung up on even one single difference in character. _ We don't want to unnecessarily fracture the internal link structure of the site, so again - any feedback is welcome, thank you. 🙂0 -
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
Intermediate & Advanced SEO | | mhans1