Friday, March 23, 2012

Should large corporations use rel=canonical?

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>> CUTTS: All right, Terry Cox, from Orlando Florida asks, "In regards to the new canonicalization
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tag, does it make sense for large corporations to consider placing that tag on every page
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due to marketing tracking codes and large levels of duplicate URLs like faceted pages
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and load balancing servers?" So, this is a great question, should you put the canonical
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tag on every single page? Well, there's a short term answer and a long term answer.
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The short term answer is I would probably say, not right now. Take a little bit of time,
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study your site architecture; think about URL and normalization, beautification, whatever
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you want to call it. Think about the structure of URLs that you want to have and take, you
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know, a few weeks, or even a few months, a couple of months to sort of assess where you
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want to go. I don't think you should just throw the canonical tag on every single page
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on your site immediately and just start wringing, you know, moving around, because it is a powerful
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tool and people do have the ability to sort of shoot themselves in the foot. So, on the
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plus side, we've seen a quarter of a million pages show up within just a few days. Where
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people are using this canonicalization tag, which is fantastic. It's good to see the traction
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and the adoption move very quickly. On the downside, we have seen one company, a very
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large company, a computer company, I won't call them out by name, where they had a Homepage
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and their Homepage was doing a redirect and they also have the canonical tag and the canonical
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tag pointed to a page that we hadn't crawled at all. And so, you know, those sorts of cases
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can be very difficult to try to do the right thing and we do the right thing. But, you
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know, it can take us a couple of days to sort of sort it out, or go and find that URL and
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crawl it. So, I wouldn't just jump in the deep end of the pool without doing some planning.
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The longer term answer is, it doesn't hurt to have this on every single page of your
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site. Ideally, you'd find other ways to solve the canonicalization but, it doesn't hurt
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to sort of say on every single page, this page maps to this canonicalized, very pretty,
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very preferred version of this URL. But what you want to do is, you want to make sure that
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it's absolute URLs; ideally it goes in one hop. It's a logical system that you designed;
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you haven't just jumped in and started to play around with. I don't see any harm in
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having that sort of thing, because we'll just follow those, what we almost think of is mini
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301 redirects within that site and we'll try to canonicalize according to those suggestions.
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We don't guarantee that we'll do it, but it should work just fine with no problems. So,
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feel free to do that, but, you know, take some time, and plan it out a little bit.

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