Quote Originally Posted by sdynamo View Post
Ah... using Yoast's plugin but never pay attention to its canonical function.
Never have the need I guess, always go 301 route.

I have more questions regarding canonical, but will just have it in separate thread. Thanks James!

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The most prevalent issue people have that I've seen where they need a canonical is with ecommerce pages where products have dynamic URL's created for one product and could have thousands of them. In that case, a canonical makes more sense so you don't have to code 1,000 301's.

Also, media companies should use them when they have republishing rights to an original work of content. In this case they don't want SEO traffic, it's just a good piece of content they want to use to provide more value to their readership.

Those are the two issues I can think of when you would want to use a canonical over a 301.