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" and rel="alternate" both necessary?
-
We are fighting some duplicate content issues across multiple domains. We have a few magento stores that have different country codes. For example: domain.com and domain.ca, domain.com is the "main" domain.
We have set up different rel="alternative codes like:
The question is, do we need to add custom rel="canonical" tags to domain.ca that points to domain.com?
For example for domain.ca/product.html to point to:
Also how far does rel="canonical" follow? For example if we have:
domain.ca/sub/product.html canonical to domain.com/sub/product.html
then,
domain.com/sub/product.html canonical to domain.com/product.html -
I'm honestly not completely clear on what the different URLs are for - I'd just add a note to keep the core difference between canonical and 301s in mind. A canonical tag only impacts Google, and eventually, search results. A 301 impacts all visitors (and moves them to the other page). A lot of people get hung up on the SEO side, but the two methods are very different for end-users.
As Tom said, if these variations have no user value, you could consolidate them altogether with 301s. I always hesitate to suggest it without in-depth knowledge of the site, though, because I've seen people run off and do something dangerous.
-
What's the purpose of the URL if there's not even any sorting or anything unique going on? If's a sorted URL (say by "size" smallest-largest for /little leage/ URL) it might be actually useful to develop some unique category content to let the page rank separately.
If the content is totally unique, I don't think you could really go wrong redirecting. To be safe, I'd probably rely on analytics to answer the question "what impact will redirection have?" For instance, is there a difference in conversion rate between the URLs. If you see a conversion bump from a more specific URL, you might want to sleuth out what's causing it.
-
Would you worry about it if the categories are somewhat useful for users to drill down the content?
For example:
/product.html
/aluminum-baseball-bats/product.html
/little-league-baseball-bats/product.htmlThey don't sell bats but it is the easiest way to describe it I guess. In this cause would you still 301 redirect the two longer urls to /product.html
-
Yes, providing that the /category1/ and /category2/ heirarchy doesn't help the user experience (e.g. product segmentation based on say, color and brand, which would be useful for users to drill down to).
I like 301s better because they are permanent, non-ambiguous, respected by all engines, and chiefly because they eliminate the possibilty of inlink dillution because the redirected URLs are never seeen.
-
Yeah, don't use rel=canonical for the same purpose as rel=alternate - the canonical tag will override the alternate/lang tag and may cause your alternate versions to rank incorrectly or not at all. It can be a bit unpredictable. If you only wanted one version to show up in search results, then rel=canonical would be ok, but rel=alternate is a softer signal to help Google rank the right page in the right situation. It's not perfect, but that's the intent.
As for multiple canonicals like what you described, that's essential like chaining 301-redirects. As much as possible, avoid it - you'll lose link equity, and Google may just not honor them in some cases. There's no hard/fast limit, and two levels may be ok in some cases, but I think it's just a recipe for trouble long-term. Fix the canonicals to be single-hop wherever possible.
-
Thanks that is what I was thinking, I just need to know more about if the bots will follow the canonical's past one level when pointing to a different domain and if so how many levels on the different sites.
-
Interesting idea, I might have to do that. Right now I have canonical elements on the .com
It is a magento store so it creates dirty duplicate content when the products are in different categories out of the box, for example magento creates the following product pages:
domain.com/store/productcategory1/product.html
domain.com/store/productcategory2/product.html
domain.com/store/product.htmlIn this case I have canonical elements pointing the categories to the main root domain.com/store/product.html
So you think it would be better to do a 301 redirect for the different product urls that are in subcategories?
-
Miles,
On your last question, I'm wondering if those two canonical tags are necessary? Are the /sub/ versions of those pages necessary for user experience? If not, I'd add a canonical element to the .com version, then redirect the /sub/product.html to /product.html. That would help you avoid splitting link authority.
-
Hey Miles,
The both are for different uses and may or may not be used in the same page depending on your situation.
If the content in the CA and COM versions is the same, then you should add a rel canonical + rel alternate, the rel alternate pointing to itself and the other version of it, and the canonical pointing to the one you consider definitive.
If the content isn't the same, then the rel canonical isn't needed (but suggested, pointing to itself in each lang/alternate), only the alternate should be in place.
You can read more on Dr. Pete's post here: http://moz.com/blog/rel-confused-answers-to-your-rel-canonical-questions
Hope that helps!
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
-
Alternate page with proper canonical tag Status: Excluded in Google webmaster tools.
In Google Webmaster Tools, I have a coverage issue. I am getting this error message: Alternate page with proper canonical tag Status: Excluded. It gives the below blog post page as an example. Any idea how to resolve? At one time, I was using handl utm grabber, but the plugin is deactivated on my website. https://www.savacations.com/turrialba-costa-ricas-garden-city/?utm_source=deleted&utm_medium=deleted&utm_term=deleted&utm_content=deleted&utm_campaign=deleted&gclid=deleted5.
Intermediate & Advanced SEO | | Alancito0 -
Optimization for "Search by Photos" feature
Howdy, fellow mozzers, Does anyone know what affects a given company photos show up in the "Search by Photos" section? I can't find any decent info.. Here is the link to SEL, describing the feature (not even google themselves seem to have an announcement about it). https://searchengineland.com/google-showing-mobile-search-by-photos-option-in-selected-local-verticals-323237 Thanks in advance!
Intermediate & Advanced SEO | | DmitriiK2 -
Rel="prev" / "next"
Hi guys, The tech department implemented rel="prev" and rel="next" on this website a long time ago.
Intermediate & Advanced SEO | | AdenaSEO
We also added a canonical tag to the 'own' page. We're talking about the following situation: https://bit.ly/2H3HpRD However we still see a situation where a lot of paginated pages are visible in the SERP.
Is this just a case of rel="prev" and "next" being directives to Google?
And in this specific case, Google deciding to not only show the 1st page in the SERP, but still show most of the paginated pages in the SERP? Please let me know, what you think. Regards,
Tom1 -
[Very Urgent] More 100 "/search/adult-site-keywords" Crawl errors under Search Console
I just opened my G Search Console and was shocked to see more than 150 Not Found errors under Crawl errors. Mine is a Wordpress site (it's consistently updated too): Here's how they show up: Example 1: URL: www.example.com/search/adult-site-keyword/page2.html/feed/rss2 Linked From: http://an-adult-image-hosting.com/search/adult-site-keyword/page2.html Example 2 (this surprised me the most when I looked at the linked from data): URL: www.example.com/search/adult-site-keyword-2.html/page/3/ Linked From: www.example.com/search/adult-site-keyword-2.html/page/2/ (this is showing as if it's from our own site) http://a-spammy-adult-site.com/search/adult-site-keyword-2.html Example 3: URL: www.example.com/search/adult-site-keyword-3.html Linked From: http://an-adult-image-hosting.com/search/adult-site-keyword-3.html How do I address this issue?
Intermediate & Advanced SEO | | rmehta10 -
Rel=canonical and internal links
Hi Mozzers, I was musing about rel=canonical this morning and it occurred to me that I didnt have a good answer to the following question: How does applying a rel=canonical on page A referencing page B as the canonical version affect the treatment of the links on page A? I am thinking of whether those links would get counted twice, or in the case of ver-near-duplicates which may have an extra sentence which includes an extra link, whther that extra link would count towards the internal link graph or not. I suspect that google would basically ignore all the content on page A and only look to page B taking into account only page Bs links. Any thoughts? Thanks!
Intermediate & Advanced SEO | | unirmk0 -
Can an "Event" in Structured Data For Google Be A Webinar?
I have a client who is has structured data for live business webinars. Google's documentation seems to talk more about music and tickets than this kind of thing. At the same time, we get an error in search console for "Name" and location, which they list as "webinar." Should I removed this failed structured data attempt or is there a way to fix it? Thanks!
Intermediate & Advanced SEO | | 945010 -
When is it recommended to use a self referencing rel "canonical"?
In what type of a situation is it the best type of practice to use a self referencing rel "canonical" tag? Are there particular practices to be cautious of when using a self referencing rel "canonical" tag? I see this practice used mainly with larger websites but I can't find any information that really explains when is a good time to make use of this practice for SEO purposes. Appreciate all feedback. Thank you in advance.
Intermediate & Advanced SEO | | SEO_Promenade0 -
Canonical VS Rel=Next & Rel=Prev for Paginated Pages
I run an ecommerce site that paginates product pages within Categories/Sub-Categories. Currently, products are not displayed in multiple categories but this will most likely happen as time goes on (in Clearance and Manufacturer Categories). I am unclear as to the proper implementation of Canonical tags and Rel=Next & Rel=Prev tags on paginated pages. I do not have a View All page to use as the Canonical URL so that is not an option. I want to avoid duplicate content issues down the road when products are displayed in multiple categories of the site and have Search Engines index paginated pages. My question is, should I use the Rel=Next & Rel=Prev tags on paginated pages as well as using Page One as the Canonical URL? Also, should I implement the Canonical tag on pages that are not yet paginated (only one page)?
Intermediate & Advanced SEO | | mj7750