1. Duplicate content tool estimates the following:
� www and non-www header response;
� Google cache check;
� Similarity check;
� Default page check;
� 404 header response;
� PageRank dispersion check
2. Xenu scans all your site links and returns a table of all available URLs � all you have to do is to sort the list by title and find pages with identical titles.
3. Google Webmaster Tools reporting your site duplicate titles and meta descriptions.
