A Little Usage of Duplicate Content Won't Hurt Rankings

Duplicate content is always a concern for webmasters. Whether it's a website stealing content from another site, or perhaps a website that hasn't taken an active role in ensuring they get great unique quality content on their site, being duplicated out of the Google index is a problem.
In the latest webmaster help video from Google's Matt Cutts, he addresses how Google handles duplicate content, and when it can negatively impact your search rankings.
Cutts started by explaining what duplicate content is and why duplicate content isn't always a problem, especially when it comes to quoting parts of other web pages.

It's important to realize that if you look at content on the web, something like 25 or 30 percent of all of the web's content is duplicate content. … People will quote a paragraph of a blog and then link to the blog, that sort of thing. So it's not the case that every single time there's duplicate content it's spam, and if we made that assumption the changes that happened as a result would end up probably hurting our search quality rather than helping our search quality.

Source url : http://searchenginewatch.com/article/2319706/Googles-Matt-Cutts-A-Little-Duplicate-Content-Wont-Hurt-Your-Rankings  

Content is the king (Quality content is what a site require)

The experts agree that which with the obligation, the contents of quality on a Web site is one in the best manners of increasing its optimization of Search Engine (SEO), but because a President of marketing in precise line, the double contents can make the opposite just.

In an article for PromotionWorld, Brian Easter, head of company of marketing of Internet NeboWeb, known as that having the contents which appear in many places on the Web an negative impact on a company a strategy of the optimization of Search Engine of S can have ('sEO).

If your contents start to appear in too many places on the Web, the principal engines of research can penalize your pages for, double of contents it writes. This can exert a definitely negative effect on your rows and thus on yours traffic and total presence on line.

But of the companies looking at to increase their optimization of Search Engine (SEO) want that their contents disappear viral and are dependent in the honourable places which can increase the traffic - something which can occur when the original irresistible contents are created.