It has been several months since the Search Engines collaborated and announced the “canonical” tag that you can add to your pages and help clean-up all the junk/duplicate pages out there.
While the canonical URL tag itself is very simple (see below), the evaluation of whether or not the tag is working or has an impact [...]

Your content is optimized, but do the search engines have the proper tools to find and index your content? The following are some of the oft-overlooked items that prepare your site for optimal indexing by the search engines.

Duplicate content is a hot issue in the SEO and online retailer industry. Be sure that you’re not getting penalized for using duplicate content. Important tips on improving your organic search engine rankings.