Google now employs a team of people to manually check the quality of website content. Website owners need to be aware of the fact that the quality of their page content will now directly affect SERP. Pages are checked for how well they are written, and how engaging and valuable they are for the visitors who read them. Publishing badly written content will now adversely affect site rankings, and reduce the volume of website traffic gained via Google. Stop buying junk content now, and invest in quality to ensure your site is not penalized.