A thesis written about the AO3's tagging system "attempts to begin exploring the question of what kind of environment the site's particular blend of open social tagging and some behind-the-scenes vocabulary control, plus hierarchical linking, creates for the users who search through it for fiction." The study, conducted in 2012, had a mix of quantitative and qualitative methods and the survey was completed by 116 people. "The current online information glut calls for some sort of subject labeling to facilitate efficiency in searching, but the volume of information is well beyond a size that could ever be dealt with by information professionals. “Social tagging” is an approach to this problem that lets non-professionals attempt to organize online information via tagging, for their own and one another's use. But social tagging is a new and rapidly evolving field, and so no consensus has yet been reached on its overall usefulness, or on what best practices might be."