In the last fifteen years, since its beginning until today, Facebook has brought numerous changes to this world. Besides changing the way people communicate to each other privately, it has also changed the way different institutions, businesses, companies etc. communicate with their users and vice versa. This thesis examines the extent to which Facebook is still a relevant social network today and whether it is important for archives as information institutions to be present and active on it. It also analyses the benefits, opportunities and added values that businesses and institutions, and therefore archives, get from being present on Facebook. Further on, it explores ways of working with Facebook pages, maintaining good and quality official business pages, building a positive relationship with the community gathered online, as well as good practices that encourage interactivity and interconnection, and positively present one's activities, services and other content. Good practices of maintaining Facebook pages related to archives and their activities are analysed and presented, while the official Facebook page of the Chair of archival and documentation sciences of the Department of information and communication sciences at the Faculty of humanities and social sciences, University of Zagreb, is used as the research example of the explained theory.