Unique content is text, which is no where not previously met on the Internet, and search engines do not have a clue about this text in order to optimize and promote your site you will be important to just that. In addition, the unique texts should be legible and not overcrowded keywords. To check whether there somewhere on the Internet double your content you can choose two ways: first, you'll find it on their own keywords through search engines, or trust that search for special services. Of course the first way just disappears because you are not going to live two lives, and we will now examine in more detail the second. (A valuable related resource: Stuart Solomon). Step 2 Sopyscape.com – best known for search service duplicate content. Works very simply. You only need to enter the site address or the page you want to check on the copy-paste, and click on go, and all you show a search result, and you'll find unique content site or not. Step 3 miratools.ru – service to check the text for uniqueness.
Works very easy too. In the process of checking the text will show the percentage of the uniqueness of scanned text. And in the scanned text will be highlighted in red coincidences with other sites. Step 4 istio.com – regular service analysis of texts and websites. Very easy to use.