But of course, there is no real news in that revelation.
Two Wall Street Journal articles address this in some detail. One details an FTC probe into Google practices (including the FTC leadership’s decision to override staff recommendations and not pursue the company) and another discusses the effects of Google’s manipulation.
The focus of this reporting was on results which favored the company commercially. Less prominent, but no less important in this study, is that Google manipulates results in order to favor social issues preferred by the company.