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
-
Google indexed "Lorem Ipsum" content on an unfinished website
Hi guys. So I recently created a new WordPress site and started developing the homepage. I completely forgot to disallow robots to prevent Google from indexing it and the homepage of my site got quickly indexed with all the Lorem ipsum and some plagiarized content from sites of my competitors. What do I do now? I’m afraid that this might spoil my SEO strategy and devalue my site in the eyes of Google from the very beginning. Should I ask Google to remove the homepage using the removal tool in Google Webmaster Tools and ask it to recrawl the page after adding the unique content? Thank you so much for your replies.
Intermediate & Advanced SEO | | Ibis150 -
Best way to "Prune" bad content from large sites?
I am in process of pruning my sites for low quality/thin content. The issue is that I have multiple sites with 40k + pages and need a more efficient way of finding the low quality content than looking at each page individually. Is there an ideal way to find the pages that are worth no indexing that will speed up the process but not potentially harm any valuable pages? Current plan of action is to pull data from analytics and if the url hasn't brought any traffic in the last 12 months then it is safe to assume it is a page that is not beneficial to the site. My concern is that some of these pages might have links pointing to them and I want to make sure we don't lose that link juice. But, assuming we just no index the pages we should still have the authority pass along...and in theory, the pages that haven't brought any traffic to the site in a year probably don't have much authority to begin with. Recommendations on best way to prune content on sites with hundreds of thousands of pages efficiently? Also, is there a benefit to no indexing the pages vs deleting them? What is the preferred method, and why?
Intermediate & Advanced SEO | | atomiconline0 -
Site-wide Canonical Rewrite Rule for Multiple Currency URL Parameters?
Hi Guys, I am currently working with an eCommerce site which has site-wide duplicate content caused by currency URL parameter variations. Example: https://www.marcb.com/ https://www.marcb.com/?setCurrencyId=3 https://www.marcb.com/?setCurrencyId=2 https://www.marcb.com/?setCurrencyId=1 My initial thought is to create a bunch of canonical tags which will pass on link equity to the core URL version. However I was wondering if there was a rule which could be implemented within the .htaccess file that will make the canonical site-wide without being so labour intensive. I also noticed that these URLs are being indexed in Google, so would it be worth setting a site-wide noindex to these variations also? Thanks
Intermediate & Advanced SEO | | NickG-1230 -
Sitemap generator which only includes canonical urls
Does anyone know of a 3rd party sitemap generator that will only include the canonical url's? Creating a sitemap with geo and sorting based parameters isn't the most ideal way to generate sitemaps. Please let me know if anyone has any ideas. Mind you we have hundreds of thousands of indexed url's and this can't be done with a simple text editor.
Intermediate & Advanced SEO | | recbrands0 -
Pagination parameters and canonical
Hello, We have a site that manages pagination through parameters in urls, this way: friendly-url.html
Intermediate & Advanced SEO | | teconsite
friendly-url.html?p=2
friendly-url.html?p=3
... We've rencently added the canonical tag pointing to friendly-url.html for all paginated results. In search console, we have the "p" parameter identified by google.
Now that the canonical has been added, should we still configure the parameter in search console, and tell google that it is being use for pagination? Thank you!0 -
Using Canonical URL to poin to an external page
I was wondering if I can use a canonical URL that points to a page residing on external site? So a page like:
Intermediate & Advanced SEO | | llamb
www.site1.com/whatever.html will have a canonical link in its header to www.site2.com/whatever.html. Thanks.0 -
Yoast & rel canonical for paginated Wordpress URLs
Hello, our Wordpress blog at http://www.jobs.ca/career-resources has a rel canonical issue since we added pagination to the front page and category-pages. We're using Yoast and it's incorrectly applying a rel-canonical meta tag referencing page 1 on page 2, 3, etc. This is a known misuse of the rel-canonical tag (per Google's Webmaster Blog - http://googlewebmastercentral.blogspot.ca/2013/04/5-common-mistakes-with-relcanonical.html, which says rel-canonical should be replaced with rel-prev and rel-next for page 2, 3, etc.). We don't see a way to specify anywhere in Yoast's options to correct this behaviour for page 2, 3, etc. Yoast allows you to override a page's canonical URL, otherwise it automatically uses the Wordpress permalink. My question is, does anyone know how to configure Yoast to properly replace rel-canonical tags with rel-prev and rel-next for paginated URLs, or do I need to look at another plugin or customize the behavior directly in my child theme code? This issue was brought up here as well: http://moz.com/community/q/canonical-help, but the only response did not relate to Yoast. (We're using Wordpress 3.6.1 and Yoast "Wordpress SEO" 1.4.18)
Intermediate & Advanced SEO | | aactive0 -
Schema.org Implementation: "Physician" vs. "Person"
Hey all, I'm looking to implement Schema tagging for a local business and am unsure of whether to use "Physician" or "Person" for a handful of doctors. Though "Physician" seems like it should be the obvious answer, Schema.org states that it should refer to "A doctor's office" instead of a physician. The properties used in "Physician" seem to apply to a physician's practice, and not an actual physician. Properties are sourced from the "Thing", "Place", "Organization", and "LocalBusiness" schemas, so I'm wondering if "Person" might be a more appropriate implementation since it allows for more detail (affiliations, awards, colleagues, jobTitle, memberOf), but I wanna make sure I get this right. Also, I'm wondering if the "Physician" schema allows for properties pulled from the "Person" schema, which I think would solve everything. For reference: http://schema.org/Person http://schema.org/Physician Thanks, everyone! Let me know how off-base my strategy is, and how I might be able to tidy it up.
Intermediate & Advanced SEO | | mudbugmedia0