This research looks at the behaviour and attitudes of YouTube and Facebook users, with the aim of understanding the role of each in users’ online lives. Please note: This is the Bitesize version of this report. The full version is available to IAB members only. For more information visit: http://www.iabuk.net/internetmarketingresearch For more IAB Bitesize research click here: http://www.iabuk.net/en/1/bitesize.html