Most of the attention in previous research on the Wikipedia community has been devoted to the study of its production side: editors and their motivations, activity and roles. However, the value of the encyclopedia is also given by the millions of people who access it every day. In this work we focus on the - until now understudied - usage side of Wikipedia, investigating readers’ preference and behaviour as a precious source of information that can provide useful feedback to the editors’ community. More information here: https://wikimania2014.wikimedia.org/wiki/Submissions/Who_reads_what_and_how:_Transforming_reading_behavior_into_valuable_feedback_for_the_Wikipedia_community