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
-
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 -
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 -
[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 -
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 -
Using the Word "Free" in Metadata
Hi Forum! I've searched previous questions, and couldn't find anything related to this. I know the word "free" when used in email marketing can trigger spam filters. If I use the word "free" in my metadata (title tag, description, and keywords just for fun) will I be penalized in any way? Thanks!
Intermediate & Advanced SEO | | Travis-W0 -
"Jump to" Links in Google, how do you get them?
I have just seen yoast.com results in Google and noticed that nearly all the indexed pages show a "Jump to" link So instead of showing the full URL under the title tag, it shows these type of links yoast.com › SEO
Intermediate & Advanced SEO | | JohnPeters
yoast.com › Social Media
yoast.com › Analytics With the SEO, Social Media and Analytics all being clickable. How has he achieved this? And is it something to try and incorporate in my sites?0 -
How does a canonical work and is it necessary to also have a no index, follow tag in place?
Across our site, we have canonical tags in place for URLs that contain duplicate content and for URLs without a trailing slash since we are using URLs WITH a trailing slash for all URLs across our site. We also recently added a no index, follow tag to all non-canonical URLs since we noticed a high number of duplicate content URLs in Google Webmaster Tools. The first part of my question is: How does a canonical work? Does the robot read the canonical and immediately go to the canonical URL or does it continue to read past the canonical tag and get to the no index, follow tag if there is one present? The second part of my question is: Is it necessary to have both a canonical tag and no index, follow tag in place? Or should the canonical tag be sufficient to avoid duplicate content? And lastly, if both a canonical tag and no index, follow tag are in place, should they be in a specific order? Canonical tag first then no index, follow tag second or no index, follow tag first then canonical tag second? I would appreciate any insight you can give. Thank you!
Intermediate & Advanced SEO | | kbbseo0