Stone Temple Consulting released the results of a new study that suggests sharing content on Google+ doesn't contribute to higher ranking. Aside from the ranking, Eric Enge sums it up by telling us that sharing content across Google+ does drive discovery. The signals probably drive indexing, with some possibility of error in this stage of the testing. The goal was to evaluate the impact that sharing content across Google+ has on discovery, indexing, and ranking of content. Enge notes that the study has limitations -- and provides a detailed examination of them along with the findings.