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.
What is the correct Canonical tag on m.site?
-
We have 2 separate sites for desktop (www.example.com) and mobile (m.example.com)
As per the guideline, we have added Rel=alternate tag on www.example.com to point to mobile URL(m.example.com) and Rel=canonical tag on m.example.com to point to Desktop site(www.example.com).However, i didn't find any guideline on what canonical tag we should add ifFor Desktop sitewww.example.com/PageA - has a canonical tag to www.example.com/PageBOn this page, we have a Rel=alternate tag m.example.com/pageAWhat will be the canonical we should add for the mobile version of Page Am.example.com/PageA - Canonical tag point to www.example.com/PageA -or www.example.com/PageB?Kalpesh
-
Hi, I hope this helps,
Do NOT point desktop pages to m. pages via a
rel="canonical" tags use rel="alternate" for that & make sure
rel="canonical"tag on the m. URL pointing to the corresponding desktop URL
Annotations for desktop and mobile URLs
- On the desktop page, add a
rel="alternate"
tag pointing to the corresponding mobile URL. This helps Googlebot discover the location of your site's mobile pages. - On the mobile page, add a
rel="canonical"
tag pointing to the corresponding desktop URL.
We support two methods to have this annotation: in the HTML of the pages themselves and in sitemaps. For example, suppose that the desktop URL is
https://example.com/page-1
and the corresponding mobile URL ishttps://m.example.com/page-1
. The annotations in this example would be as follows.Annotations in the HTML
On the desktop page (
https://www.example.com/page-1
), add the following annotation:<code dir="ltr"><linkrel="alternate"media="only screen="" and="" (max-width:="" 640px)"<br="">href="https://m.example.com/page-1"></linkrel="alternate"media="only></code>
On the mobile page (
https://m.example.com/page-1
), the required annotation should be:<code dir="ltr"><linkrel="canonical"href="https: www.example.com="" page-1"=""></linkrel="canonical"href="https:></code>
This
rel="canonical"
tag on the mobile URL pointing to the desktop page is required.A page have a self-referencing canonical URL
In the example above, we link the non-canonical page to the canonical version. But should a page set a rel=canonical for itself? I strongly recommend having a canonical link element on every page and Google has confirmed that’s best. That’s because most Sites & CMS’s will allow URL parameters without changing the content.
So all of these URLs would show the same content:
-
https://www.example.com/page-1
-
https://www.example.com/page-1/?isnt=it-awesome
-
https://www.example.com/page-1/?cmpgn=twitter
-
https://www.example.com/page-1/?cmpgn=facebook
Using a mobile website version of their desktop version, they need to implement a canonical tag on their mobile website page with an URL of the desktop version.
For example,
Your main domain: iamexample.com
Your mobile version: m.iamexample.com
Then, have this tag in the section of your main domain -
And, have this tag in the section of your mobile version page -
Mobile-Specific URLs, Such as AMP Pages or a Mobile-Specific Subdomain
Creating content with mobile in mind is a marketing must -- just be sure to remember to set your canonical URLs when you have pages that are specific to mobile but have the same content as a page on the desktop version of your website. For AMP pages specifically, Google also provides detailed guidelines on how to correctly differentiate your Accelerated Mobile Page from your standard webpage.
SEE:
- https://developers.google.com/search/mobile-sites/mobile-seo/separate-urls
- https://yoast.com/rel-canonical/
- https://moz.com/blog/cross-domain-rel-canonical-seo-value-cross-posted-content
- https://moz.com/learn/seo/canonicalization
- https://moz.com/blog/rel-canonical
Hope this helps,
Tom
- On the desktop page, add a
-
You shouldn't have canonical tags on either pointing to the other IMO. A canonical tag, deployed on a web-page, says to Google "I am the non-canonical version of a page. Unless you have signals like links which contradict this tag strongly, don't index this non-canonical page at all. Only index the canonical URL which I am pointing you to"
So the page which you place the canonical tag on, becomes (itself) non canonical and therefore gives a medium-to-strong signal to Google that it should be de-indexed. As such, if you plaster your mobile site in canonical tags, you are essentially telling Google that the entire mobile site is non-canonical and thereby probably not a great candidate for indexation. Do you want your mobile site to rank? I assume you do
I don't know what guidance you have read. Google's guidance is often woefully out of date as their documentation update cycle for organic-search stuff is really poor. If it was something here on Moz, I personally disagree with it
I would just stick with the alternate tags. Anyway if you have canonicals going in two directions, you will create a soft redirect loop where both URLs specify themselves as non-canonical. That could make things way worse than they are now
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
-
Duplicate title while setting canonical tag.
Hi Moz Fan, My websites - https://finance.rabbit.co.th/ has run financial service, So our main keywords is about "Insurance" in Thai, But today I have an issues regarding to carnonical tag. We have a link that containing by https://finance.rabbit.co.th/car-insurance?showForm=1&brand_id=9&model_id=18&car_submodel_id=30&ci_source_id=rabbit.co.th&car_year=2014 and setting canonical to this url - https://finance.rabbit.co.th/car-insurance within 5,000 items. But in this case I have an warning by site audit tools as Duplicate Page Title (Canonical), So is that possible to drop our ranking. What should we do, setting No-Index, No-Follow for all URL that begin with ? or keep them like that.
Technical SEO | | ASKHANUMANTHAILAND0 -
Do H2 tags carry more weight than h4 tags?
Of course H tags are key signals for relevance in search. Does an h2 tag send a significantly "louder" signal than an h4 tag?
Technical SEO | | aj6130 -
Staging site and "live" site have both been indexed by Google
While creating a site we forgot to password protect the staging site while it was being built. Now that the site has been moved to the new domain, it has come to my attention that both the staging site (site.staging.com) and the "live" site (site.com) are both being indexed. What is the best way to solve this problem? I was thinking about adding a 301 redirect from the staging site to the live site via HTACCESS. Any recommendations?
Technical SEO | | melen0 -
Isnt it better to have headlines in H1 and H2 tags instead of p tags?
I am working with a simple site http://http://lightsigns.com/Uniko_Manufacturing_Limited.html They seek more SEO traffic. However, the two big headlines that read "Wholesale Supply to the Sign and Display Industries" which is on line 241 and 242 of the source code, its in a p tag, i.e. <p <span class="webkit-html-tag">style</p <span>="padding-top: 0pt; " class="paragraph_style_1">Wholesale Supply to the and <p <span class="webkit-html-tag">style</p <span>="padding-bottom: 0pt; " class="paragraph_style_1">Sign and Display Industries Likewise, the product titles are in p tags, also. For example, on the Slide-in Light Box product page, http://lightsigns.com/Slide_In_light_box.html , I have done keyword research and no one is using the words slide in light box.Plus, it is also a p tag, ie. line 43 reads style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Slide-in Light Box If I suggest that they make an H2 tag with SEO-optimized keywords such as Display Light Box - Slide-In LIght Box, would this indeed help SEO? In summary, is it correct to say that H1 and H2 tags are stronger signals to the search bots of what the page is about?
Technical SEO | | BridgetGibbons1 -
I need help with a PHP canonical URL tags
I found a little difficult for me to do a canonical tag in my PHP. On-Page Report Card We check to make sure that IF you use canonical URL tags, it points to the right page. If the canonical tag points to a different URL, engines will not count this page as the reference resource and thus, it won't have an opportunity to rank. If you've not made this page the rel=canonical target, change the reference to this URL. NOTE: For pages not employing canonical URL tags, this factor does not apply. I don't know how to tidy my PHP Any suggestion.
Technical SEO | | lnietob0 -
Tags showing up in Google
Yesterday a user pointed out to me that Tags were being indexed in Google search results and that was not a good idea. I went into my Yoast settings and checked the "nofollow, index" in my Taxanomies, but when checking the source code for no follow, I found nothing. So instead, I went into the robot.txt and disallowed /tag/ Is that ok? or is that a bad idea? The site is The Tech Block for anyone interested in looking.
Technical SEO | | ttb0 -
How to structure rel=canonical for a e commerce site
Hello, So I have searched the Q & A , Google, the zen cart forum and at this point I am looking for some one to give a concrete answer on what I should do. There is a lot of different opinions on " rel=canonical" and how to apply it , since there are many other variable in place. I have a zen cart site. I am using the latest 1.3.9 version. The default setting ( seem to me) uses the rel=canonical to point back to the specific link product or category respectively. Most of the time I have two scenarios. 1. Main category ---> Sub category----> Product 2. Main Category----> Product I'll give an example http://www.perfectindesign.com/awards ---main category http://www.perfectindesign.com/awards/acrylic-awards sub category http://www.perfectindesign.com/awards/acrylic-awards/slanted-award product (this example has three sub categories with maybe 12 products in one 4 in the second and 5 in the third) From looking at the source code for each url it the rel=canonical just points back to its own url. I want to avoid competing against my self, for the example above keyword "acrylic awards" so should the use of the re=canonical be changes site wide to have products point back to sub categories when they exist and have products point back to main categories when no sub categories exist? I am very new to seo, specifically eCommerce seo. If you have experience and have done this to a site you manage for a client or your own please advise how to proceed. Also if I'm missing some thing that will give me a better understanding of the bigger seo picture that would be great. Thanks, Yevgeny
Technical SEO | | Yevgeny0 -
Header Tags
Ok so I am writing different pages and the first heading is an H3 just because I wanted to it be a certain size. Then as you see the content, I have an H1 tag. Example page: http://www.oxfordmshomes.net/condos/acadia-court-Oxford-MS you can see that "Acadia First" is the first thing you see on the page and it uses an H3 element. Long story short, my hierarchy is wrong. Does this have any negative effect on my SEO efforts?
Technical SEO | | blake-766240