For webpages which may duplicate some or all of their content with other pages (for legitimate reasons), the canonical URL is the URL of the page which search engines should link to.

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25
votes
2answers
669 views

How to use rel='canonical' properly

I have 3 URLS that serve the same data: www.example.com/product/foo www.example.com/product/foo?id=1 www.example.com?product=foo For Google's sake I want the URL www.example.com/product/foo to be ...
11
votes
1answer
744 views

How to handle canonical url changes like Stack Overflow

Stack Overflow sites all have pretty urls which include the question title. In the HTML it also have canonical url for that page. I just found out that when I change the question title, the url is ...
8
votes
2answers
528 views

Canonical'd pages on subdomain showing up in Google search results

You might have heard that we launched Facebook Stack Overflow yesterday. As part of this, we modified our code to put <meta rel="canonical" ... tags on every question and user on the ...
8
votes
3answers
497 views

How to avoid getting negative points from Google AdSense

I have a news based website in which the primary contents includes news, image albums and videos. Out of these I have copyrights for the images and the videos are embedded from YouTube. My site is ...
7
votes
2answers
1k views

Canonical URL for a home page and trailing slashes

My home page could be potentially linked as: http://example.com http://example.com/ http://example.com/?ref=1 http://example.com/index.html http://example.com/index.html?ref=2 (the same page is ...
7
votes
1answer
143 views

Letting search engines know that different links to identical pages stress different parts of the page

When you follow a permalink to a chat message in the Stack Exchange chat, you get a view of the transcript page for the day that contains the particular message. This message is highlighted in yellow, ...
6
votes
2answers
769 views

Canonical tag on paginated pages?

I noticed that StackOverflow uses a rel=canonical tag on page 2+ of answers. For example, see http://stackoverflow.com/questions/6470651/creating-a-memory-leak-with-java?page=2&tab=votes#tab-top ...
6
votes
2answers
444 views

Is it ok for a canonical link to point to itself?

I've got the canonical: <link href="http://www.Site.com/Blog/how-to-know-when-this" rel="canonical" /> Is it ok if this is on the page it is pointing to? Also I'm putting it on all these ...
6
votes
2answers
154 views

When the canonical page itself changes URL

This is a continuation of the question: How to handle canonical URL changes like Stack Overflow. Say I have the canon URL: questions/11/car <---canonically-linked-from--- questions/11/ What ...
5
votes
3answers
294 views

Why treat these as different URLs?

These are all strictly different urls: http://www.example.com/page http://www.example.com/pAge http://www.example.com/page/ http://www.example.com/paGE/ I get that it conforms to the strict ISO ...
5
votes
1answer
232 views

Is it valid to have 2, 3, or more canonical tags?

I have seen a major website have more than 2 canonical tags on certain pages. Here's the page URL: http://www.example.com/en_GB/shop/details.cfm?R=PRODUCT23:en_GB Here's the first canonical ...
5
votes
2answers
416 views

SEO and duplicate content for default document

SEO experts sometimes demand that default document, e.g. www.site.com/index.html redirects with 301 to www.site.com, so: Is that really necessary? Does Google really penalize that?
5
votes
3answers
262 views

Should a canonical URL be search engine friendly?

I'm using Drupal with search engine friendly URLs. The way Drupal works is that there's two ways to reference a node with SEF URLS switched on: The SEF way, eg. ...
5
votes
3answers
738 views

Should I use nofollow on internal links that don't need to be crawled?

We have a product navigation engine that allow our customers to filter products based on attributes (size, color, etc.). We are implementing an upgrade that allows them to use "multi-select" ...
5
votes
2answers
101 views

Does a plain vanilla site benefit from a “canonical” directive?

So I thought I knew what "canonical" was for. As I understood it (and to be fair, most of the examples on the web) it avoids search engines seeing foo.htm and foo.htm?parameter=1 as duplicate ...
5
votes
2answers
698 views

Does the “canonical name” in DNS make any difference to search engines?

Some of our sites are setup with an "a record" to an IP address and some are setup as a cname of a server that then has an "a name" to the same server IP. I want it to be consistent. Which is the ...
5
votes
1answer
119 views

Canonical Tag Not Being Recognized

I'm puzzled by the first Google search result in this list. The first result has the following rel="canonical" tag: <link rel="canonical" ...
5
votes
2answers
2k views

Pagination, Duplicate Content, and SEO

Please consider a list of items (forum comments, articles, shoes, doesn't matter) which are spread over multiple pages. Different sort orders are supported (by date, by popularity, by price, etc). ...
4
votes
1answer
252 views

www and non www can suffer duplicated content

Do you know if i should use canonical tag, or 301 redirection from http://mydomain.com to http://www.mydomain.com To avoid duplicated content penalty in case other pages link to the domain without ...
4
votes
2answers
566 views

Should I add a trailing slash to my canonical link or not?

I'm just working through some PHP to set up a canonical link for each page on one of my websites and I'm wondering what's the correct link for the home page: Is it: <link rel="canonical" ...
4
votes
3answers
253 views

Google ranking - difference between example.com and example.com/?ref=id

Does it impact a site's Google ranking if I link to the site with a "referrer" query-string? e.g: example.com/?ref=mysite instead of example.com ?
4
votes
1answer
199 views

Republishing blog posts on a popular website

I started my blog about programming yesterday and in order to promote and increase traffic I submitted my rss to Codeproject which pulls my posts and publishes them at Codeproject. While it increases ...
4
votes
1answer
82 views

Google indexed the same page under two URLs (despite rel-canonical)

The Super User question "Playing mp3 in quodlibet displays “GStreamer output pipeline could not be initialized” error" is indexed under two URLs in Google: ...
4
votes
2answers
284 views

Should rel=canonical point to page one of a set and still have rel=prev/next on the page as well?

I've got a page which displays search results and I've added rel=prev and rel=next meta tags to the page to cover the paging. However, someone is saying I should also add a rel=canonical tag to the ...
4
votes
3answers
1k views

Multiple URL's going to same page - Kosher for Google?

I hear conflicting answers from people about this, and I'm a developer by trade, and my SEO knowledge is not what it should be. Here's my situation: I run a website that lists hotels, restaurants, ...
4
votes
3answers
236 views

can canonical links be used to make 'duplicate' pages unique?

We have a website that allows users to list items for sale. Think ebay - except we don't actually deal with selling the item, we just list it for sale and provide a way to contact the seller. Anyhow, ...
4
votes
2answers
2k views

Best SEO practices for mobile URLs: 301, rel=canonical, or something else?

I am developing a site with a mobile version and am trying to figure the appropriate way to manage the URLs for search engines. So far I've considered: Having a separate mobile site (m.example.com) ...
4
votes
1answer
241 views

What is a best canonical URL for a search result page? [closed]

I have read a Google guideline About rel="canonical" and I have known that A canonical page is the preferred version of a set of pages with highly similar content. I have a search page which ...
4
votes
1answer
163 views

What Google will do while switching from 301/404 to 200?

Imagine a pagination script with 20 total pages: articles.php?page=18 What should I do when some third party web site links to a non-existent page? articles.php?page=21 (page 21 is out of ...
4
votes
3answers
182 views

How should I fix the problem of duplicate content created by my CMS system's manual page alias feature?

My site’s CMS has a manual page alias feature which is in wide use. I recently noticed that the aliased pages and the original pages are showing up in GA with separate traffic. For example: ...
4
votes
2answers
411 views

Having google index canonicals but users using parameters - correct?

I'm working on a site that has a search facility with multiple parameters that look up property listings. The possible parameters are: City, Area, Building Type, Min. Bedrooms, Max Rental Price, ...
4
votes
1answer
702 views

Correct syntax for Canonical - link or meta tag?

I'm getting a little confused about adding canonical tags to pages. Some (most?) guides suggest using a link tag thusly: <link rel="canonical" href="www.example.com/somepage" /> but some ...
4
votes
1answer
899 views

Canonicalization for www/non-www URLs and IP/domain on a Windows server

I have checked my website using this SEO tool and the results report 2 issues: Test your site for potential URL canonicalization issues. Canonicalization describes how a site can use slightly ...
4
votes
1answer
227 views

Using rel=canonical and noindex in a 1-n partners environment

We sell complete sites including the domains to several partners that create content that is shown together at the main site. What we want to achieve is that the main site copy is the original but the ...
4
votes
1answer
108 views

Should mobile webpages have hreflang links to non-mobile pages?

My site has multilingual links, which are specified like this on non-mobile pages: <link rel="alternate" hreflang="en" href="http://mydomain.com/page" /> <link rel="alternate" ...
4
votes
5answers
278 views

Using subdomains or directories for main categories?

I have a website which references places to travel to in the world. Those places are (of course) grouped by countries. Here is an example of an actual URL of my website: ...
3
votes
5answers
224 views

Can I Use A Canonical Tag Instead of a Redirect for Updated Content?

I have some old articles on my blog that get quite a bit of traffic, but are very outdated. I want to remove them from Google's index using the noindex tag, but I'm not sure what the best approach ...
3
votes
2answers
432 views

SEO: 301 redirects and canonical tag

from the book "Art of SEO": 301s carry cross-domain functionality, meaning you can redirect a page at Domain1.com to Domain2.com and carry over those search engine metrics. This is not ...
3
votes
2answers
218 views

Will canonical tag referencing unsecure HTTP URLs on a HTTPS page cause the unsecure message?

If a secure HTTPS page has a canonical tag referencing the HTTP version, will this cause the message in the browser that the page is using unsecure elements and prevent the green lock icon appearing? ...
3
votes
2answers
314 views

falling down Google ranking with canoncial tags and Google site verification

Recently I released this site live, which is a small brochure site for a local catering company. I took the time to add a canonical <link> tag and also verify the site with Google, so the ...
3
votes
2answers
267 views

How to prevent duplicate content in Google when using state and city in friendlyurl?

I want to provide friendlyurls to my visitors on my venue site. Visitors should be able to easily type the name of a region to access the venues in that specific region. Like ...
3
votes
3answers
256 views

How to use the canonical tag for multiregion websites and duplicate content

We want to use the canonical tag for an multiple region website with the same content. For Example: www.example.com/services.htm www.example.com/uk/services.htm Then if we use the canonical tag ...
3
votes
1answer
2k views

How does Google treat hash fragment inside a canonical URL

I have seen many websites using slugs in their URL to boost SEO such as this: http://example.com/article/1543/how-to-boost-seo/ I was thinking if I could do something like this instead: ...
3
votes
2answers
854 views

Rel canonical link tag pointing to the same page

I'm implementing the canonical tag in my page to avoid be penalized with duplicate content flag by search engines. My doubt are the following: If I have a page COPY with the canonical tag pointing ...
3
votes
1answer
170 views

Same page in different “locations” on same site - duplicate content? [duplicate]

Possible Duplicate: What is duplicate content and how can I avoid being penalized for it on my site? The same page, or rather the same content on a page is accessible from two very similar ...
3
votes
2answers
132 views

Similar URLs for same page

I'm working with a site that uses slightly different URLs for the same content. The sitemap lists the pages as: www.website.com/webpage.html If you surf through the site the same page is found at: ...
3
votes
2answers
117 views

Would the following URLs result in duplicate content if I only used one canonical link?

In your experience, have you ever had problems with duplicate content being caused by the following URLs: www.mysite.net www.mysite.net/ www.mysite.net/index.html Do you think that this could ...
3
votes
2answers
290 views

Which is best for PageRank? When multi-Aliases point to same server, with multi-language folders

Imagine situation where multiple aliases point to the same server, where htacces divides them into their own language folders. Example: mywebsite.fr >> /fr/home mywebsite.de >> ...
3
votes
1answer
57 views

Canonical URLs in sortable paginated lists

How should one use rel="canonical" in sortable paginated lists? An unsorted list of products is not the same as the same list sorted, nor are lists sorted in different ways equivalent. For example, ...
3
votes
2answers
123 views

Is there a way I can redirect search engine traffic by U.S. State or Zip Code?

I work for an e-commerce company that operates solely within the United States. However, the price of goods and availability of our products depends on what State or even Zip Code you reside in (we ...