Article Spinning

Writing articles with backlinks to your site helps with the page rank and promotes the site higher up the search engine.  Therefore the more articles you have pointing back to your site the better your ranking should be.  Unfortunately it doesn't quite work that way because the articles need to be unique.  Google does not penalize sites with duplicate content but the duplicate content does not feature well in SERPS (Search Engine Results page),

Article Spinning has therefore been developed.  An article can be spun in various ways:

• A web owner may employ writes to article spin manually
• Writes can do their own article spinning manually
• Writes can use article spinning software

See Introduction to Article Writing