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Canonical Tag

Difference between noindex & canonical tag

   
7:26 pm on Feb 17, 2010 (gmt 0)

5+ Year Member



I'm slightly mystified!

If I reproduce a piece of content on my site, e.g. I reproduce an article I'd published on another section of the site, but in the skin of the new section, I'd have duplicate content issues. So, to get over this, I noindex the duplicate content page.

Can anyone tell me the difference between the canonical tag and the use of noindex, especially as a page that contains the canonical tag is dropped from Google's index anyway?
8:15 am on Feb 18, 2010 (gmt 0)

WebmasterWorld Senior Member themadscientist is a WebmasterWorld Top Contributor of All Time 5+ Year Member Top Contributors Of The Month



A noindex tag removes the page from the index, but the canonical tag (in theory and IMO in practice definitely more than the noindex tag) consolidates link weight. A canonical tag is like an 'I can't do a 301 escape route' to say 'the page referenced in the canonical tag is where I would 301 if I could', while a noindex tag just says 'don't show the page in the results.'
9:02 am on Feb 18, 2010 (gmt 0)

5+ Year Member



Thanks for the reply. But a page with a canonical tag doesn't make it into the index anyway I thought?

I can understand that pages already in existence need to transfer their PR, link value etc, but for brand new pages where you place duplicate content I fail to see the advantage of a canonical tag over a noindex.

Can you tell I'm confused? :-)
11:46 am on Feb 19, 2010 (gmt 0)

5+ Year Member



"But a page with a canonical tag doesn't make it into the index anyway I thought?"

Quite the contrary. Pages with a canonical tag are more likely to end up in the index under that canonical URL. Without a canonical tag a search engine decides for itself which is the preferred version, which may not necessarily be what you prefer.

Personally I prefer not to use noindex tags, as I think I'd always prefer my content indexed as well as any links on the page. I use canonical URL tags to prevent duplicate content issues.

But if your noindex solution works fine for you, by all means stick with it.
 

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