Google really concerns about the duplicated contents issue in their database. If Google (or any other search engines) find many duplicated contents in your site, Google stops indexing pages even for the new pages and starts removing many duplicated contents in your site.
If you find that Google deindexing you site, you are a part of the duplicated content problems. Every webmaster are facing this deindexing situation everyday. In fact, we were experimenting this duplicated contents issue with Google search engine.
Since we don’t really know the Google real algorithm we start removing many duplicated contents as many as possible in our sites and the result is really astonishing.
We get 28%(average) more pages indexing in Google database by removing many (or all) duplicated contents (more than 1000+ pages) in our sites (more than 100+ sites) within two weeks. This is just one of the techniques for “How to get more pages indexed by Google?”.
Just trim or diet your site. Actually, “Less is more”, a phrase from the 1855 poem Andrea del Sarto (the faultless painter) by Robert Browning. How true is it?
What if, someone copy your contents and put it on their sites. Since you have a digital date stamp in your content, we hope that Google can find out the original sources. All you have to do is just keep posting unique and quality contents.
Most of the articles directory will suffer the duplicated contents issue because authors used to syndicate their same articles in many different sites.
Duplicate content issue is contagious. Just stay away from it.