Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Intermediate & Advanced SEO
    4. Rel="canonical" and rel="alternate" both necessary?

    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?

    Intermediate & Advanced SEO
    4
    10
    12525
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • AlliedComputer
      AlliedComputer last edited by

      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

      1 Reply Last reply Reply Quote 0
      • Dr-Pete
        Dr-Pete Staff @TomSlage last edited by

        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.

        1 Reply Last reply Reply Quote 0
        • TomSlage
          TomSlage @AlliedComputer last edited by

          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.

          1 Reply Last reply Reply Quote 0
          • AlliedComputer
            AlliedComputer @TomSlage last edited by

            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.html

            They 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

            TomSlage 1 Reply Last reply Reply Quote 0
            • TomSlage
              TomSlage @AlliedComputer last edited by

              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.

              AlliedComputer 1 Reply Last reply Reply Quote 1
              • Dr-Pete
                Dr-Pete Staff @FedeEinhorn last edited by

                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.

                1 Reply Last reply Reply Quote 1
                • AlliedComputer
                  AlliedComputer @FedeEinhorn last edited by

                  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.

                  1 Reply Last reply Reply Quote 0
                  • AlliedComputer
                    AlliedComputer @TomSlage last edited by

                    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.html

                    In 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?

                    TomSlage 1 Reply Last reply Reply Quote 0
                    • TomSlage
                      TomSlage last edited by

                      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.

                      AlliedComputer Dr-Pete 2 Replies Last reply Reply Quote 1
                      • FedeEinhorn
                        FedeEinhorn last edited by

                        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!

                        AlliedComputer Dr-Pete 2 Replies Last reply Reply Quote 2
                        • 1 / 1
                        • First post
                          Last post

                        Got a burning SEO question?

                        Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


                        Start my free trial


                        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.

                        • See all categories

                        Related Questions

                        • Nigel_Carr

                          Canonical Chain

                          This is quite advanced so maybe Rand can give me an answer? I often have seen questions surrounding a 301 chain where only 85% of the link juice is passed on to the first target and 85% of that to the next one, up to three targets. But how about a canonical chain? What do I mean by this:? I have a client who sells lighting so I will use a real example (sans domain) I don't want 'new-product' pages appearing in SERPS. They dilute link equity for the categories they replicate and often contain identical products to the main categories and subcategories. I don't want to no index them all together I'd rather tell Google they are the same as the higher category/sub category. (discussion whether a noindex/follow tag would be better?) If I canonicalize new-products/ceiling-lights-c1/kitchen-lighting-c17/kitchen-ceiling-lights-c217 to /ceiling-lights-c1/kitchen-lighting-c17/kitchen-ceiling-lights-c217 I then subsequently discover that everything in kitchen-ceiling-lights-c217 is already in /kitchen-lighting-c17 and I decide to canonicalize those two - so I place a /kitchen-lighting-c17 canonical on /kitchen-ceiling-lights-c217. Then what happens to the new-products canonical? Is it the same rule - does it pass 85% of link equity back to the non new-product URL and 85% of that back to the category? does it just not work? or should I do noindexi/follow Now before you jump in: Let's assume these are done over a period of time because the obvious answer is: Canonicalize both back to /ceiling-lights-c1/kitchen-lighting-c17 I know that and that is not what I am asking. What if they are done in a sequence what is the real result? I don't want to patronise anyone but please read this carefully before giving an answer. Regards Nigel Carousel Projects.

                          Intermediate & Advanced SEO | | Nigel_Carr
                          0
                        • benjaminleemd

                          My "search visibility" went from 3% to 0% and I don't know why.

                          My search visibility on here went from 3.5% to 3.7% to 0% to 0.03% and now 0.05% in a matter of 1 month and I do not know why. I make changes every week to see if I can get higher on google results. I do well with one website which is for a medical office that has been open for years. This new one where the office has only been open a few months I am having trouble. We aren't getting calls like I am hoping we would. In fact the only one we did receive I believe is because we were closest to him in proximity on google maps. I am also having some trouble with the "Links" aspect of SEO.  Everywhere I see to get linked it seems you have to pay. We are a medical office we aren't selling products so not many Blogs would want to talk about us. Any help that could assist me with getting a higher rank on google would be greatly appreciated. Also any help with getting the search visibility up would be great as well.

                          Intermediate & Advanced SEO | | benjaminleemd
                          1
                        • rmehta1

                          [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 | | rmehta1
                          0
                        • EcommerceSite

                          Should pages with rel="canonical" be put in a sitemap?

                          I am working on an ecommerce site and I am going to add different views to the category pages. The views will all have different urls so I would like to add the rel="canonical" tag to them. Should I still add these pages to the sitemap?

                          Intermediate & Advanced SEO | | EcommerceSite
                          0
                        • BeytzNet

                          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 | | BeytzNet
                          0
                        • Kadel

                          Pipe ("|") in my website's title is being replaced with ":" in Google results

                          Hi , One of the websites I'm promoting and working on is www.pau-brasil.co.il.
                          It's wordpress-based website and as you can see the html's Title is "PauBrasil | some hebrew slogan".
                          (Screenshot: http://i.imgur.com/2f80EEY.gif)
                          When I'm searching for "PauBrasil" (Which is the brand's name) , one of the results google shows is "PauBrasil: Some Hebrew Slogan" (Screenshot: http://i.imgur.com/eJxNHrO.gif ) Why does the pipe is being replaced with ":" ?
                          And not just that , as you can see there's a "blank space" missing between the the ":" to the slogan.
                          (note: the websites has been indexed by google crawler at least 4 times so I find it hard to believe it can be the reason) I've keep on looking and found out that there's another page in that website with the exact same title
                          but when I'm looking for it in google , it shows the title as it really is , with pipe. ("|").
                          (Screenshot: http://i.imgur.com/dtsbZV2.gif) Have you ever encountered something like that?
                          Can it be that the duplicated title cause that weird "replacement"? Thanks in advance,
                          Kadel

                          Intermediate & Advanced SEO | | Kadel
                          0
                        • PeterRota

                          Set up a rel canonical

                          I have a question. I was wondering, if it was possible to set up a rel canonical. When I can't access the non canonical pages? For example, my site as at www.site.com , but the non cannocail is at site.com is their any way to set thet up without actually edting it at site.com ? Thanks for your help

                          Intermediate & Advanced SEO | | PeterRota
                          0
                        • mj775

                          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 | | mj775
                          0

                        Get started with Moz Pro!

                        Unlock the power of advanced SEO tools and data-driven insights.

                        Start my free trial
                        Products
                        • Moz Pro
                        • Moz Local
                        • Moz API
                        • Moz Data
                        • STAT
                        • Product Updates
                        Moz Solutions
                        • SMB Solutions
                        • Agency Solutions
                        • Enterprise Solutions
                        Free SEO Tools
                        • Domain Authority Checker
                        • Link Explorer
                        • Keyword Explorer
                        • Competitive Research
                        • Brand Authority Checker
                        • Local Citation Checker
                        • MozBar Extension
                        • MozCast
                        Resources
                        • Blog
                        • SEO Learning Center
                        • Help Hub
                        • Beginner's Guide to SEO
                        • How-to Guides
                        • Moz Academy
                        • API Docs
                        About Moz
                        • About
                        • Team
                        • Careers
                        • Contact
                        Why Moz
                        • Case Studies
                        • Testimonials
                        Get Involved
                        • Become an Affiliate
                        • MozCon
                        • Webinars
                        • Practical Marketer Series
                        • MozPod
                        Connect with us

                        Contact the Help team

                        Join our newsletter
                        Moz logo
                        © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
                        • Accessibility
                        • Terms of Use
                        • Privacy

                        Looks like your connection to Moz was lost, please wait while we try to reconnect.