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.
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
-
Partial Match or RegEx in Search Console's URL Parameters Tool?
So I currently have approximately 1000 of these URLs indexed, when I only want roughly 100 of them. Let's say the URL is www.example.com/page.php?par1=ABC123=&par2=DEF456=&par3=GHI789= All the indexed URLs follow that same kinda format, but I only want to index the URLs that have a par1 of ABC (but that could be ABC123 or ABC456 or whatever). Using URL Parameters tool in Search Console, I can ask Googlebot to only crawl URLs with a specific value. But is there any way to get a partial match, using regex maybe? Am I wasting my time with Search Console, and should I just disallow any page.php without par1=ABC in robots.txt?
Intermediate & Advanced SEO | | Ria_0 -
"noindex, follow" or "robots.txt" for thin content pages
Does anyone have any testing evidence what is better to use for pages with thin content, yet important pages to keep on a website? I am referring to content shared across multiple websites (such as e-commerce, real estate etc). Imagine a website with 300 high quality pages indexed and 5,000 thin product type pages, which are pages that would not generate relevant search traffic. Question goes: Does the interlinking value achieved by "noindex, follow" outweigh the negative of Google having to crawl all those "noindex" pages? With robots.txt one has Google's crawling focus on just the important pages that are indexed and that may give ranking a boost. Any experiments with insight to this would be great. I do get the story about "make the pages unique", "get customer reviews and comments" etc....but the above question is the important question here.
Intermediate & Advanced SEO | | khi50 -
Difference in Number of URLS in "Crawl, Sitemaps" & "Index Status" in Webmaster Tools, NORMAL?
Greetings MOZ Community: Webmaster Tools under "Index Status" shows 850 URLs indexed for our website (www.nyc-officespace-leader.com). The number of URLs indexed jumped by around 175 around June 10th, shortly after we launched a new version of our website. No new URLs were added to the site upgrade. Under Webmaster Tools under "Crawl, Site maps", it shows 637 pages submitted and 599 indexed. Prior to June 6th there was not a significant difference in the number of pages shown between the "Index Status" and "Crawl. Site Maps". Now there is a differential of 175. The 850 URLs in "Index Status" is equal to the number of URLs in the MOZ domain crawl report I ran yesterday. Since this differential developed, ranking has declined sharply. Perhaps I am hit by the new version of Panda, but Google indexing junk pages (if that is in fact happening) could have something to do with it. Is this differential between the number of URLs shown in "Index Status" and "Crawl, Sitemaps" normal? I am attaching Images of the two screens from Webmaster Tools as well as the MOZ crawl to illustrate what has occurred. My developer seems stumped by this. He has submitted a removal request for the 175 URLs to Google, but they remain in the index. Any suggestions? Thanks,
Intermediate & Advanced SEO | | Kingalan1
Alan0 -
URL Parameter Being Improperly Crawled & Indexed by Google
Hi All, We just discovered that Google is indexing a subset of our URL’s embedded with our analytics tracking parameter. For the search “dresses” we are appearing in position 11 (page 2, rank 1) with the following URL: www.anthropologie.com/anthro/category/dresses/clothes-dresses.jsp?cm_mmc=Email--Anthro_12--070612_Dress_Anthro-_-shop You’ll note that “cm_mmc=Email” is appended. This is causing our analytics (CoreMetrics) to mis-attribute this traffic and revenue to Email vs. SEO. A few questions: 1) Why is this happening? This is an email from June 2012 and we don’t have an email specific landing page embedded with this parameter. Somehow Google found and indexed this page with these tracking parameters. Has anyone else seen something similar happening?
Intermediate & Advanced SEO | | kevin_reyes
2) What is the recommended method of “politely” telling Google to index the version without the tracking parameters? Some thoughts on this:
a. Implement a self-referencing canonical on the page.
- This is done, but we have some technical issues with the canonical due to our ecommerce platform (ATG). Even though page source code looks correct, Googlebot is seeing the canonical with a JSession ID.
b. Resubmit both URL’s in WMT Fetch feature hoping that Google recognizes the canonical.
- We did this, but given the canonical issue it won’t be effective until we can fix it.
c. URL handling change in WMT
- We made this change, but it didn’t seem to fix the problem
d. 301 or No Index the version with the email tracking parameters
- This seems drastic and I’m concerned that we’d lose ranking on this very strategic keyword Thoughts? Thanks in advance, Kevin0 -
What is a "Bad Link" in Google's eyes? Low DA?
Hi there, I'm going through my link profile and I noticed I have a few links that are from <10 DA sites. One has a DA of 6. Should I remove these? Aside from any referral traffic I receive from these links (I know there is none), are these links hurting me?
Intermediate & Advanced SEO | | Travis-W
What should I look out for in a site I may guest post on? Thanks!
Travis0 -
App "Review" Website with DA of 58 - Good or Bad Link?
Hi, We have a web app. All our competitors are on http://www.appappeal.com. We can suggest ourselves here http://www.appappeal.com/contact/suggest. If we get reviewed and the link is a follow link is this a good thing or a bad thing. They call themselves a directory and you can pay to get a "priority" review. Should we avoid or is it a good link as the DA is 58?
Intermediate & Advanced SEO | | Studio330 -
How would you handle 12,000 "tag" pages on Wordpress site?
We have a Wordpress site where /tag/ pages were not set to "noindex" and they are driving 25% of site's traffic (roughly 100,000 visits year to date). We can't simply "noindex" them all now, or we'll lose a massive amount of traffic. We can't possibly write unique descriptions for all of them. We can't just do nothing or a Panda update will come by and ding us for duplicate content one day (surprised it hasn't already). What would you do?
Intermediate & Advanced SEO | | M_D_Golden_Peak1 -
Maximum of 100 links on a page vs rel="nofollow"
All, I read within the SEOmoz blog that search engines consider 100 links on a page to be plenty, and we should try (where possible) to keep within the 100 limit. My question is; when a rel="nofollow" attribute is given to a link, does that link still count towards your maximum 100? Many thanks Guy
Intermediate & Advanced SEO | | Horizon0