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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28
votes
2answers
850 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 ...
12
votes
1answer
1k 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 ...
10
votes
1answer
2k 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 ...
8
votes
2answers
598 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
3k views

Should URL paths be case sensitive?

My website's URLs are currently case-insensitive. For example, both of the following links show the exact same page: http://example.com/about http://example.com/About However, taking a look at the ...
8
votes
3answers
718 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
3answers
404 views

Why treat these as URLs with different path capitalization and trailing slash as different?

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 ...
7
votes
1answer
6k 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: ...
7
votes
1answer
146 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
860 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
652 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
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). ...
6
votes
2answers
195 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
2answers
315 views

Do query string case differences affect whether a URL is Canonical?

If I have two URL's where the only difference is the case of the query string: http://example.com?param=TEST http://example.com?param=test Are they both considered equal by search engines? I know ...
5
votes
1answer
515 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
462 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
1answer
235 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 ...
5
votes
3answers
291 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
806 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
156 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
3answers
2k 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, ...
5
votes
2answers
897 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
158 views

Should I use a canonical tag when only 50% of the content is duplicated?

I have a city guide website covering bars, restaurants and clubs. Each of these venues have their own subpage on my website like: example.com/steersons-steak-house-darling-harbour-sydney/ For all ...
5
votes
1answer
120 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
1answer
115 views

How to transfer link authority but keep url?

I have this old site (let's call it oldsite.com), with excellent branding and authority, that I however want to gradually move to a new domain (newsite.com), better suited for a future concept. ...
5
votes
1answer
158 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" ...
5
votes
1answer
59 views

Can I declare a duplicate page via javascript for google?

Most sources of documentation state that one can declare a webpage a duplicate of another by applying this tag on the duplicate page: <link rel="canonical" href="(absolute URL to original ...
4
votes
1answer
770 views

URLs with “space”, “%20”, “+” are canonicals?

If I have a URL encoded and another does not, e.g. <a href="http://example.com/images/foo abc.jpg">Image</a> <a href="http://example.com/images/foo+abc.jpg">Image</a> <a ...
4
votes
1answer
267 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
1k 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
291 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 ...
4
votes
3answers
258 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
2answers
778 views

Does URL encoding create duplicate content?

An SEO expert was testing my site, and noticed that my URLs contained the special character :. He said that would create duplicate content, because google would interpret any url containing : as two ...
4
votes
1answer
77 views

Do I need to put rel=“canonical” in the original page?

To other pages, with the same content, I need to put rel="canonical" in the link tag to prevent duplication. <link href="https://example.com/original-page.html" rel="canonical"> My question, ...
4
votes
1answer
130 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
333 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
250 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
75 views

How to let users know that the site is available over HTTPS?

My websites are now available over HTTPS, but I don't want to make that the default at this point: My canonical URLs are still HTTP and I'm not ready to make the SEO switch My certificates are SNI ...
4
votes
1answer
1k 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
3answers
274 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
438 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
779 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
3k 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
236 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
1answer
2k views

Multilingual sites SEO and canonical

I'm in the process of improving the SEO in one of our client's multilingual sites. Currently the site passes a user the site in their preferred language by checking for a language cookie set by the ...
4
votes
1answer
124 views

How to use HTTPS canonical link tag in Blogger blog?

Look out, Google official security blog - http://googleonlinesecurity.blogspot.com Above blog forced user to visit https link (without using any kind of JS), but normal Blogger blog serve both ...
4
votes
1answer
275 views

Our company's white label site was removed from Google's search index, would canonicalization help?

I recently started working for a new company and they have a lot of white label sites. Just last week I checked Google Webmaster Tools for one of our bigger in-house white label sites (one we ...
4
votes
1answer
237 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
6answers
326 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: ...