Facebook focused relentlessly on mobile throughout the keynote, positioning themselves as the layer which unites the increasingly fragmented world of mobile operating systems. They revealed that over 1 billion app installs had been driven through Facebook, and over $3bn in payments managed whilst pointing out that their own apps represent more than 20% of the total time spent by users on their phones. Hoping to encourage more developers to take advantage of Facebook sign in within their apps they launched a number of updates which gave users more control of their privacy settings, or even the ability to login anonymously whilst still being able to sync your activity across devices.One thing that was very clear throughout was that Facebook is truly a mobile focussed business now, with the desktop version of the site absent throughout. For marketers wondering how to take advantage of the booming mobile segment a platform with 1 billion mobile users isn’t a bad place to start!!