How serious is duplicate page content?

[devonkrusich]

We just launched our site on a new platform - Magento Enterprise.  We have a wholesale catalog and and retail catalog.  We have up to 3 domains pointing to each product.  We are getting tons of duplicate content errors.

What are the best practices for dealing with this?

Here is an example:

mysite.com/product.html

mysite.com/category/product.html

mysite.com/dynamic-url

[PeterM22]

This is serious and can get you into trouble.. I would 301 redirect them to one page

[KeriMorgret]

Thread duplicated at http://www.seomoz.org/q/how-serious-is-suplicate-page-content, closing this version.