What does it mean?

It means that content of your website should be unique.

If search engines discovered duplicated content, you may be penalized.  It could happen even if you are the original author.  Unfortunately, Google can not determine who stole whose content and your web [...]]]> To create a website for optimization search you have to avoid duplicate content.

What does it mean?

It means that content of your website should be unique.

If search engines discovered duplicated content, you may be penalized.  It could happen even if you are the original author.  Unfortunately, Google can not determine who stole whose content and your web site could be chosen to be excluded from all search engines results.  There is also another penalty option; to put your website in supplemental result.  Supplemental result is not part of the search engine indexing.  Thus both penalties are very bad for your SEO strategy.

How to avoid it?

First of all, how I pointed above, you have to write your own content.  Secondly, regularly check your web pages for duplicate content.

How to do this?

One of the most popular tools to check duplicate content is Copyscape (located at www.copyscape.com)

1. Open Copyscape in your browser window
2. Type the URL of your web site into Copyscape’s search box
3. Click ‘Go’

In a few seconds the web sites with duplicate content will appear.
If you have found, that your content has been stolen, you have to without delay report the spam to the search engines.
Google spam report is at www.google.com/contact/spamreport.html
Yahoo spam report is at http://help.yahoo.com/l/us/yahoo/search/spam_abuse.html
Bing web spam report is at https://support.discoverbing.com/eform.aspx?productKey=bingcontentremoval&ct=eformts

Submit reports of spam immediately.  To keep your web pages on the high level of search engine rank, check your web pages content on regular basis.

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