Daily Active Users (DAUs). We define a daily active user as a registered Facebook user who logged in and visited Facebook through our website or a mobile device, or took an action to share content or activity with his or her Facebook friends or connections via a third-party website that is integrated with Facebook, on a given day. We view DAUs, and DAUs as a percentage of MAUs, as measures of user engagement.
When I first heard the stat, it was before FB Connect and Like Buttons had launched, and it seems to remain consistent today. The data seems to suggest that most users who use Facebook Connect or Like buttons will also visit Facebook.com (web or mobile) that same day. They do have a note saying that there may be mobile applications that drive daily activity automatically without active user intervention, and it may impact their measurement by up to 5%.
Daily Active Users (DAUs). We define a daily active user as a registered Facebook user who logged in and visited Facebook through our website or a mobile device, or took an action to share content or activity with his or her Facebook friends or connections via a third-party website that is integrated with Facebook, on a given day. We view DAUs, and DAUs as a percentage of MAUs, as measures of user engagement.
Source: http://sec.gov/Archives/edgar/data/1326801/00011931251203451...
When I first heard the stat, it was before FB Connect and Like Buttons had launched, and it seems to remain consistent today. The data seems to suggest that most users who use Facebook Connect or Like buttons will also visit Facebook.com (web or mobile) that same day. They do have a note saying that there may be mobile applications that drive daily activity automatically without active user intervention, and it may impact their measurement by up to 5%.