How to deal with canonicals on dup product pages in Opencart?

[moon-boots]

So I have a seriously large amount of duplicate content problems on my Opencart site, and I've been trying to figure out the best way to fix them one by one. But is there a common, easy way of doing this? Because frankly, it is a nightmare otherwise. I bought an extension which doesn't appear to work (http://www.opencart.com/index.php?route=extension/extension/info&extension_id=20468&utm_source=ordercomplete&utm_medium=email&utm_campaign=wm), so now I'm at a loss.

[danwebman]

You need to make each product which appears to be duplicate different or choose the more relevant page to be the canonical.

The other thing which can cause issues is if multiple URLs go to the same page, even tracking can cause this.

The thing to ensure is all pages have a canonical which points to the most relevant content.