Duplicate content
Duplicate content can mean SEO doom
Identical content that is posted in multiple sites can mean certain doom for that’s content’s search ranking.
Search engines work hard to avoid duplicate content appearing on a given page of search results. Google does offer users the option of duplicate content with its “similar results have been omitted” link displayed below results that have duplicates. Search engines use an automated process to index web pages and select one from among the duplicates to display, and discard the rest.
The search engine war against duplicated content is both an effort to provide more relevant search results to users and an indirect effort to preserve the originality of internet content, which is often copied pasted back onto websites.
Suggestions for avoiding issues of duplicate content on sites undergoing search engine optimization (SEO) are the use of canonical tags or the new tools that Google has recently released to allow for legitimate content duplication.