PracticalEcommerce published an interesting article about SEO content:
Canonical tags are an essential tool to prevent duplicate content in organic search results. "Canonical" in search engine parlance means the one true page out of potentially many duplicates.
If you are interested in SEO content, have a look at the article "High return rates in online shopping and why poor copywriting is to blame" here in the AX Magazine. The whole article from the PracticalEcommerce Blog you can find here.