How has the most revolutionary innovation of our time - the Internet - transformed our world? What does it mean for the modern family? How has it changed our concepts of privacy? Of celebrity? Of love, sex and hate? This is the online reporter's notebook for The Untangling the Web column in The Observer newspaper and the Untangling the Web book, published 4 July 2013 by Guardian Books and Faber & Faber. It's the collection of interviews, links, photos, videos and brainstorms that are feeding this compendium of the latest research about the social effects of the online world. Feedback is always welcome! Send email to aleks.krotoski.freelance@guardian.co.uk or via Twitter, by tagging your tweets with #UTTW or @aleksk. Aleks Krotoski has been writing about interactivity since 1999. She has a PhD in social psychology, focussing on relationships and influence online. Aleks is the host of the Tech Weekly podcast and presents BBC Radio 4's science series, Digital Human. Read Aleks' Observer column at guardian.co.uk/untanglingtheweb