On Thursday, Google launched two new ways for web apps to interact with Google Drive. The first - app data folders - stores critical app data in its own private folder to avoid accidental movement or deletion from users. The second - custom properties - allows users to "create searchable fields that are private to your app or shared across apps."
To help developers fully grasp these new features, Google has thrown together a quick Google Developers Live session that addresses these features. Check it out: