Google’s Matt Cutts On Publishers With Duplicate Content: Use The Canonical Tag

In a video released by Matt Cutts, Google’s head of search spam, Matt said publishers who publish similar or duplicative stories on different URLs may use the rel=canonical tag to help consolidate the PageRank of the stories and avoid any issues with Google.

Source:http://searchengineland.com/googles-matt-cutts-on-publishers-with-duplicate-content-use-the-canonical-tag-181331