Private Label Rights articles (PLR as they are commonly called) are articles to which everyone has access to as well as full permission money making website to do with as they darn well please. The best idea is to rewrite those PLR articles into something completely different from the original article.

 There, however, are many people who simply decide to use the PLR article they have purchased exactly as they are; which will lead to some confusion among the search engine duplicate content filters. This also is not the best way to make a good impression.