While Googles Matt Cutts has certainly provided a wealth of helpful tips via the companys Webmaster Central YouTube channel, he is not the only one to do so.

Greg Grothaus of the Search Quality Team has posted a video along with a presentation on the Webmaster Central Blog covering duplicate content and multiple site issues that webmasters continue to face when trying to rank well in Google. Greg begins by clearing up a popular myth about duplicate content, and that is that Google penalizes sites for having duplicate content. This is not the case. Thats not to say that duplicate content cant have a negative impact on your rankings, but Google itself is not penalizing you for it.