SEO Duplicate Contents Filtered By Search Engines

Know how a search engine determines what duplicate content is.
There are basically four types of duplicate content that are filtered out:

1. Websites with Identical Pages - These pages are considered duplicate, as well as websites that are identical to another website on the Internet are also considered to be spam. Affiliate sites with the same look and feel which contain identical content, for example, are especially vulnerable to a duplicate content filter. Another example would be a website with doorway pages. Many times, these doorways are skewed versions of landing pages. However, these landing pages are identical to other landing pages. Generally, doorway pages are intended to be used to spam the search engines in order to manipulate search engine results.

2. Scraped Content - Scraped content is taking content from a web site and repackaging it to make it look different, but in essence it is nothing more than a duplicate page. With the popularity of blogs on the internet and the syndication of those blogs, scraping is becoming more of a problem for search engines.

3. E-Commerce Product Descriptions - Many eCommerce sites out there use the manufacturer's descriptions for the products, which hundreds or thousands of other eCommerce stores in the same competitive markets are using too. This duplicate content, while harder to spot, is still considered spam.

4. Distribution of Articles - If you publish an article, and it gets copied and put all over the Internet, this is good, right? Not necessarily for all the sites that feature the same article. This type of duplicate content can be tricky, because even though Yahoo and MSN determine the source of the original article and deems it most relevant in search results, other search engines like Google may not, according to some experts.