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.
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!
-
Thank you for you responses and advice!
-
Very nice addition John.
-
Ryan, spot on as always.
One other thing, it sounds like some of the canonicals you're placing on pages would be better suited to 301 redirects, like correcting a URL for not having a trailing slash or not. If you can avoid using canonicals and use 301 redirects instead, that's the preferred method for resolving duplicate content issues. Canonicals are more for when there are parameters on the URLs, and you can't get away from serving the pages with those parameters.
-
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 first thing to understand is the canonical tag is a suggestion, not an order. While a search engine will usually honor the canonical tag, there are instances where Google or other SEs may determine the canonical tag is not being used correctly so they disregard the canonical tag. Based on this understanding, yes the robot will read the entire page regardless of the canonical tag status.
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?
The two tags you mention conflict. You would never use both tags on the same page.
Noindex means you do not wish the page to appear in the search index. The canonical tag means you do wish the content to be included in the search index, but use the canonical URL in the index.
if both a canonical tag and no index, follow tag are in place, should they be in a specific order?
The order of meta tags does not matter. If a page was marked with both a canonical tag and a noindex tag, the noindex tag would take effect and the page would not be indexed, so the canonical tag would not have any effect.
In short, you want to use the canonical tag to resolve duplicate content issues, not the noindex tag.
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
-
Should I disable the indexing of tags in Wordpress?
Hi, I have a client that is publishing 7 or 8 news articles and posts each month. I am optimising selected posts and I have found that they have been adding a lot of tags (almost like using hashtags) . There are currently 29 posts but already 55 tags, each of which has its own archive page, and all of which are added to the site map to be indexed (https://sykeshome.europe.sykes.com/sitemap_index.xml). I came across an article (https://crunchify.com/better-dont-use-wordpress-tags/) that suggested that tags add no value to SEO ranking, and as a consequence Wordpress tags should not be indexed or included in the sitemap. I haven't been able to find much more reliable information on this topic, so my question is - should I get rid of the tags from this website and make the focus pages, posts and categories (redirecting existing tag pages back to the site home page)? It is a relatively new websites and I am conscious of the fact that category and tag archive pages already substantially outnumber actual content pages (posts and news) - I guess this isn't optimal. I'd appreciate any advice. Thanks wMfojBf
Intermediate & Advanced SEO | | JCN-SBWD0 -
Multiple H2 tags
Is it advisable to use only one H2 tag? The template designs for some reason is ended up with multiple H2 tags, I realise if any think it's that each one is that are important and it is all relative. Just trying to assess if it's worth the time and effort to rehash the template. Has anyone done any testing or got any experience? Thanks
Intermediate & Advanced SEO | | seoman101 -
Question about Indexing of /?limit=all
Hi, i've got your SEO Suite Ultimate installed on my site (www.customlogocases.com). I've got a relatively new magento site (around 1 year). We have recently been doing some pr/seo for the category pages, for example /custom-ipad-cases/ But when I search on google, it seems that google has indexed the /custom-ipad-cases/?limit=all This /?limit=all page is one without any links, and only has a PA of 1. Whereas the standard /custom-ipad-cases/ without the /? query has a much higher pa of 20, and a couple of links pointing towards it. So therefore I would want this particular page to be the one that google indexes. And along the same logic, this page really should be able to achieve higher rankings than the /?limit=all page. Is my thinking here correct? Should I disallow all the /? now, even though these are the ones that are indexed, and the others currently are not. I'd be happy to take the hit while it figures it out, because the higher PA pages are what I ultimately am getting links to... Thoughts?
Intermediate & Advanced SEO | | RobAus0 -
Removing index.php
I have question for the community and whether or not this is a good or bad idea. I currently have a Joomla site that displays www.domain.com/index.php in all the URLs with the exception of the home page. I have read that it's better to not have index.php showing in the URL at all. Does it really matter if I have index.php in my URL? I've read that it is a bad practice. I am thinking about installing the sh404SEF component on my site and removing the index.php. However, I rank pretty high for the keywords I want in Google, Bing and Yahoo. All of the URLs that show up in the searches have index.php as part of the URL. Has anyone ever used sh404SEF to remove the index.php and how did you overcome not loosing your search engine links? I don't want an existing search showing www.domain.com/index.php/sales and it not linking to the correct page which would now be www.domain.com/sales. I guess I could insert the proper redirects in the htaccess file. But I was hoping to avoid having every page of my site in the htaccess file for redirecting. Any help or advice appreciated.
Intermediate & Advanced SEO | | MedGroupMedia0 -
Canonical tag + HREFLANG vs NOINDEX: Redundant?
Hi, We launched our new site back in Sept 2013 and to control indexation and traffic, etc we only allowed the search engines to index single dimension pages such as just category, brand or collection but never both like category + brand, brand + collection or collection + catergory We are now opening indexing to double faceted page like category + brand and the new tag structure would be: For any other facet we're including a "noindex, follow" meta tag. 1. My question is if we're including a "noindex, follow" tag to select pages do we need to include a canonical or hreflang tag afterall? Should we include it either way for when we want to remove the "noindex"? 2. Is the x-default redundant? Thanks for any input. Cheers WMCA
Intermediate & Advanced SEO | | WMCA0 -
[E-commerce] Duplicate content due to color variations (canonical/indexing)
Hello, We currently have a lot of color variations on multiple products with almost the same content. Even with our canonicals being set, Moz's crawling tool seems to flag them as duplicate content. What we have done so far: Choosing the best-selling color variation (our "master product") Adding a rel="canonical" to every variation (with our "master product" as the canonical URL) In my opinion, it should be enough to address this issue. However, being given the fact that it's flagged as duplicate by Moz, I was wondering if there is something else we should do? Should we add a "noindex,follow" to our child products and "index,follow" to our master product? (sounds to me like such a heavy change) Thank you in advance
Intermediate & Advanced SEO | | EasyLounge0 -
How important is the number of indexed pages?
I'm considering making a change to using AJAX filtered navigation on my e-commerce site. If I do this, the user experience will be significantly improved but the number of pages that Google finds on my site will go down significantly (in the 10,000's). It feels to me like our filtered navigation has grown out of control and we spend too much time worrying about the url structure of it - in some ways it's paralyzing us. I'd like to be able to focus on pages that matter (explicit Category and Sub-Category) pages and then just let ajax take care of filtering products below these levels. For customer usability this is smart. From the perspective of manageable code and long term design this also seems very smart -we can't continue to worry so much about filtered navigation. My concern is that losing so many indexed pages will have a large negative effect (however, we will reduce duplicate content and be able provide much better category and sub-category pages). We probably should have thought about this a year ago before Google indexed everything :-). Does anybody have any experience with this or insight on what to do? Thanks, -Jason
Intermediate & Advanced SEO | | cre80 -
Should I prevent Google from indexing blog tag and category pages?
I am working on a website that has a regularly updated Wordpress blog and am unsure whether or not the category and tag pages should be indexable. The blog posts are often outranked by the tag and category pages and they are ultimately leaving me with a duplicate content issue. With this in mind, I assumed that the best thing to do would be to remove the tag and category pages from the index, but after speaking to someone else about the issue, I am no longer sure. I have tried researching online, but there isn't anything that provided any further information. Please can anyone with any experience of dealing with issues like this or with any knowledge of the topic help me to resolve this annoying issue. Any input will be greatly appreciated. Thanks Paul
Intermediate & Advanced SEO | | PaulRogers0