Perfection Explain. What Duplicate Content is. By Professional Marketer (Very Useful For Newbie)
credit to :
http://anne-pottinger.com/arti...myth-to-rest-once-and-for-all/ 
Article Marketers – Lay the Duplicate Content Myth To Rest Once and For All
Monday, May 2nd, 2011 at 6:31 pm
1Share
Over and over, on all the popular Internet Marketing forums, especially the Warrior Forum, new article marketers pose the question: “if I post the same article in multiple article directories, will Google penalize me for duplicate content?” Or: “after posting an article to my blog or website, do I need to re-write or spin it before posting it to article directories?”
It’s really amazing how these two words duplicate content have become such a completely misunderstood concept. I think the entire confusion was perpetuated by opportunity seekers who sell services or software to spin articles After all, it’s hardly in their best interests to be seen to accept the real truth.
Just stop for a moment, forget all the myth and hype and think rationally. All the news services, for example Bloomberg, the Associated Press, Reuters, Scripps Howard, CNS etc., are in business for one reason: to distribute news in a pre-written format. These news feeds are picked up and published all over the internet by thousands of diverse subscribing web sites. They don’t employ people to re-write the content; it’s published exactly as they receive it, with a byline to the source.
Wikipedia describes Web Syndication thus: Web syndication is a form of syndication in which website material is made available to multiple other sites. Most commonly, web syndication refers to making web feeds available from a site in order to provide other people with a summary or update of the website’s recently added content (for example, the latest news or forum posts). The term can also be used to describe other kinds of licensing website content so that other websites can use it.
This should be the mind-set of every professional Article Marketer. You should write high quality content, publish it first on their own blog, wait for it to be indexed by Google, then publish it, without any editing (other than adding a resource box), on EZine Articles and other article directories. By doing this, you will transcend the horde of ‘article directory marketers’, and move into the more elite class of Article Syndicators.
Following Google’s February algorithm update, known as the Panda, or Farmer update, aimed at identifying low quality sites and content, writers and syndicators of top quality material are reporting significant upturns. Google calls it a “high quality sites algorithm”, and it is causing the cream to rise to the top.
Actually, the only time “duplicate content” can become an issue is on your own blog (and this is extremely unlikely). The software powering the site structure (WordPress, b2evolution, Nucleus, TypePad, etc.), may repeat the same content in multiple formats. One post can appear repeatedly through sub-directories created by categories, tags, dates, sitemap, archives etc..
Direct Quote From Google WebMaster Central Blog:
Google wants to serve up unique results and does a great job of picking a version of your content to show if your sites includes duplication. If you don’t want to worry about sorting through duplication on your site, you can let us worry about it instead.
Duplicate content doesn’t cause your site to be penalized. If duplicate pages are detected, one version will be returned in the search results to ensure variety for searchers.
Duplicate content doesn’t cause your site to be placed in the supplemental index. Duplication may indirectly influence this however, if links to your pages are split among the various versions, causing lower per-page PageRank.
If you are still concerned and have a WordPress blog, there are a number of excellent SEO plugins available that can go a long way to eliminate this problem, Platinum SEO Pack and All In One SEO are the two most popular.
ความรู้ทั่วไป
