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
-
Moving html site to wordpress and 301 redirect from index.htm to index.php or just www.example.com
I found page duplicate content when using Moz crawl tool, see below. http://www.example.com
Intermediate & Advanced SEO | | gozmoz
Page Authority 40
Linking Root Domains 31
External Link Count 138
Internal Link Count 18
Status Code 200
1 duplicate http://www.example.com/index.htm
Page Authority 19
Linking Root Domains 1
External Link Count 0
Internal Link Count 15
Status Code 200
1 duplicate I have recently transfered my old html site to wordpress.
To keep the urls the same I am using a plugin which appends .htm at the end of each page. My old site home page was index.htm. I have created index.htm in wordpress as well but now there is a conflict of duplicate content. I am using latest post as my home page which is index.php Question 1.
Should I also use redirect 301 im htaccess file to transfer index.htm page authority (19) to www.example.com If yes, do I use
Redirect 301 /index.htm http://www.example.com/index.php
or
Redirect 301 /index.htm http://www.example.com Question 2
Should I change my "Home" menu link to http://www.example.com instead of http://www.example.com/index.htm that would fix the duplicate content, as indx.htm does not exist anymore. Is there a better option? Thanks0 -
Should I Keep adding 301s or use a noindex,follow/canonical or a 404 in this situation?
Hi Mozzers, I feel I am facing a double edge sword situation. I am in the process of migrating 4 domains into one. I am in the process of creating URL redirect mapping The pages I am having the most issues are the event pages that are past due but carry some value as they generally have one external followed link. www.example.com/event-2008 301 redirect to www.newdomain.com/event-2016 www.example.com/event-2007 301 redirect to www.newdomain.com/event-2016 www.example.com/event-2006 301 redirect to www.newdomain.com/event-2016 Again these old events aren't necessarily important in terms of link equity but do carry some and at the same time keep adding multiple 301s pointing to the same page may not be a good ideas as it will increase the page speed load time which will affect the new site's performance. If i add a 404 I will lose the bit of equity in those. No index,follow may work since it won't index the old domain nor the page itself but still not 100% sure about it. I am not sure how a canonical would work since it would keep the old domain live. At this point I am not sure which direction I should follow? Thanks for your answers!
Intermediate & Advanced SEO | | Ideas-Money-Art0 -
H2 Tags- Can you have more than 1 H2 tag
Hi All, Screaming frog has identified that we have a few H2 tags on our pages , although we only have 1 H1 tag. We have numerous H3,H4's etc. I am wondering, is it good SEO to have only 1 H2 tag like with H1 tag or can you have more ? thanks Peter
Intermediate & Advanced SEO | | PeteC120 -
Proper 301 in Place but Old Site Still Indexed In Google
So i have stumbled across an interesting issue with a new SEO client. They just recently launched a new website and implemented a proper 301 redirect strategy at the page level for the new website domain. What is interesting is that the new website is now indexed in Google BUT the old website domain is also still indexed in Google? I even checked the Google Cached date and it shows the new website with a cache date of today. The redirect strategy has been in place for about 30 days. Any thoughts or suggestions on how to get the old domain un-indexed in Google and get all authority passed to the new website?
Intermediate & Advanced SEO | | kchandler0 -
Do you add 404 page into robot file or just add no index tag?
Hi, got different opinion on this so i wanted to double check with your comment is. We've got /404.html page and I was wondering if you would add this page to robot text so it wouldn't be indexed or would you just add no index tag? What would be the best approach? Thanks!
Intermediate & Advanced SEO | | Rubix0 -
How do you de-index and prevent indexation of a whole domain?
I have parts of an online portal displaying in SERPs which it definitely shouldn't be. It's due to thoughtless developers but I need to have the whole portal's domain de-indexed and prevented from future indexing. I'm not too tech savvy but how is this achieved? No index? Robots? thanks
Intermediate & Advanced SEO | | Martin_S0 -
De-indexed Link Directory
Howdy Guys, I'm currently working through our 4th reconsideration request and just have a couple of questions. Using Link Detox (www.linkresearchtools.com) new tool they have flagged up a 64 links that are Toxic and should be removed. After analysing them further alot / most of them are link directories that have now been de-indexed by Google. Do you think we should still ask for them to be removed or is this a pointless exercise as the links has already been removed because its been de-indexed. Would like your views on this guys.
Intermediate & Advanced SEO | | ScottBaxterWW0 -
Should I remove Meta Keywords tags?
Hi, Do you recommend removing Meta Keywords or is there "nothing to lose" with having them? Thanks
Intermediate & Advanced SEO | | BeytzNet0